Reformat using black

chat_box/apps.py

@@ -2,4 +2,4 @@ from django.apps import AppConfig
 
 
 class ChatBoxConfig(AppConfig):
-    name = 'chat_box'
+    name = "chat_box"

chat_box/migrations/0001_initial.py

@@ -9,22 +9,43 @@ class Migration(migrations.Migration):
     initial = True
 
     dependencies = [
-        ('judge', '0100_auto_20200127_0059'),
+        ("judge", "0100_auto_20200127_0059"),
     ]
 
     operations = [
         migrations.CreateModel(
-            name='Message',
+            name="Message",
             fields=[
-                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('time', models.DateTimeField(auto_now_add=True, verbose_name='posted time')),
-                ('body', models.TextField(max_length=8192, verbose_name='body of comment')),
-                ('author', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='judge.Profile', verbose_name='user')),
+                (
+                    "id",
+                    models.AutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                (
+                    "time",
+                    models.DateTimeField(auto_now_add=True, verbose_name="posted time"),
+                ),
+                (
+                    "body",
+                    models.TextField(max_length=8192, verbose_name="body of comment"),
+                ),
+                (
+                    "author",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        to="judge.Profile",
+                        verbose_name="user",
+                    ),
+                ),
             ],
             options={
-                'verbose_name': 'message',
-                'verbose_name_plural': 'messages',
-                'ordering': ('-time',),
+                "verbose_name": "message",
+                "verbose_name_plural": "messages",
+                "ordering": ("-time",),
             },
         ),
     ]

chat_box/migrations/0002_message_hidden.py

@@ -6,13 +6,13 @@ from django.db import migrations, models
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('chat_box', '0001_initial'),
+        ("chat_box", "0001_initial"),
     ]
 
     operations = [
         migrations.AddField(
-            model_name='message',
-            name='hidden',
-            field=models.BooleanField(default=False, verbose_name='is hidden'),
+            model_name="message",
+            name="hidden",
+            field=models.BooleanField(default=False, verbose_name="is hidden"),
         ),
     ]

chat_box/migrations/0003_auto_20200505_2306.py

@@ -6,13 +6,13 @@ from django.db import migrations, models
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('chat_box', '0002_message_hidden'),
+        ("chat_box", "0002_message_hidden"),
     ]
 
     operations = [
         migrations.AlterField(
-            model_name='message',
-            name='hidden',
-            field=models.BooleanField(default=True, verbose_name='is hidden'),
+            model_name="message",
+            name="hidden",
+            field=models.BooleanField(default=True, verbose_name="is hidden"),
         ),
     ]

chat_box/migrations/0004_auto_20200505_2336.py

@@ -6,13 +6,13 @@ from django.db import migrations, models
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('chat_box', '0003_auto_20200505_2306'),
+        ("chat_box", "0003_auto_20200505_2306"),
     ]
 
     operations = [
         migrations.AlterField(
-            model_name='message',
-            name='hidden',
-            field=models.BooleanField(default=False, verbose_name='is hidden'),
+            model_name="message",
+            name="hidden",
+            field=models.BooleanField(default=False, verbose_name="is hidden"),
         ),
     ]

chat_box/migrations/0005_auto_20211011_0714.py

@@ -7,22 +7,52 @@ import django.db.models.deletion
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('judge', '0116_auto_20211011_0645'),
-        ('chat_box', '0004_auto_20200505_2336'),
+        ("judge", "0116_auto_20211011_0645"),
+        ("chat_box", "0004_auto_20200505_2336"),
     ]
 
     operations = [
         migrations.CreateModel(
-            name='Room',
+            name="Room",
             fields=[
-                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('user_one', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='user_one', to='judge.Profile', verbose_name='user 1')),
-                ('user_two', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='user_two', to='judge.Profile', verbose_name='user 2')),
+                (
+                    "id",
+                    models.AutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                (
+                    "user_one",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="user_one",
+                        to="judge.Profile",
+                        verbose_name="user 1",
+                    ),
+                ),
+                (
+                    "user_two",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="user_two",
+                        to="judge.Profile",
+                        verbose_name="user 2",
+                    ),
+                ),
             ],
         ),
         migrations.AddField(
-            model_name='message',
-            name='room',
-            field=models.ForeignKey(default=None, null=True, on_delete=django.db.models.deletion.CASCADE, to='chat_box.Room', verbose_name='room id'),
+            model_name="message",
+            name="room",
+            field=models.ForeignKey(
+                default=None,
+                null=True,
+                on_delete=django.db.models.deletion.CASCADE,
+                to="chat_box.Room",
+                verbose_name="room id",
+            ),
         ),
     ]

chat_box/migrations/0006_userroom.py

@@ -7,18 +7,42 @@ import django.db.models.deletion
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('judge', '0116_auto_20211011_0645'),
-        ('chat_box', '0005_auto_20211011_0714'),
+        ("judge", "0116_auto_20211011_0645"),
+        ("chat_box", "0005_auto_20211011_0714"),
     ]
 
     operations = [
         migrations.CreateModel(
-            name='UserRoom',
+            name="UserRoom",
             fields=[
-                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('last_seen', models.DateTimeField(verbose_name='last seen')),
-                ('room', models.ForeignKey(default=None, null=True, on_delete=django.db.models.deletion.CASCADE, to='chat_box.Room', verbose_name='room id')),
-                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='judge.Profile', verbose_name='user')),
+                (
+                    "id",
+                    models.AutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("last_seen", models.DateTimeField(verbose_name="last seen")),
+                (
+                    "room",
+                    models.ForeignKey(
+                        default=None,
+                        null=True,
+                        on_delete=django.db.models.deletion.CASCADE,
+                        to="chat_box.Room",
+                        verbose_name="room id",
+                    ),
+                ),
+                (
+                    "user",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        to="judge.Profile",
+                        verbose_name="user",
+                    ),
+                ),
             ],
         ),
     ]

chat_box/migrations/0007_auto_20211112_1255.py

@@ -6,13 +6,13 @@ from django.db import migrations, models
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('chat_box', '0006_userroom'),
+        ("chat_box", "0006_userroom"),
     ]
 
     operations = [
         migrations.AlterField(
-            model_name='userroom',
-            name='last_seen',
-            field=models.DateTimeField(auto_now_add=True, verbose_name='last seen'),
+            model_name="userroom",
+            name="last_seen",
+            field=models.DateTimeField(auto_now_add=True, verbose_name="last seen"),
         ),
     ]

chat_box/migrations/0008_ignore.py

@@ -7,17 +7,33 @@ import django.db.models.deletion
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('judge', '0116_auto_20211011_0645'),
-        ('chat_box', '0007_auto_20211112_1255'),
+        ("judge", "0116_auto_20211011_0645"),
+        ("chat_box", "0007_auto_20211112_1255"),
     ]
 
     operations = [
         migrations.CreateModel(
-            name='Ignore',
+            name="Ignore",
             fields=[
-                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('ignored_users', models.ManyToManyField(to='judge.Profile')),
-                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='ignored_chat_users', to='judge.Profile', verbose_name='user')),
+                (
+                    "id",
+                    models.AutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("ignored_users", models.ManyToManyField(to="judge.Profile")),
+                (
+                    "user",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="ignored_chat_users",
+                        to="judge.Profile",
+                        verbose_name="user",
+                    ),
+                ),
             ],
         ),
     ]

chat_box/models.py

@@ -6,25 +6,35 @@ from django.utils.translation import gettext_lazy as _
 from judge.models.profile import Profile
 
 
-__all__ = ['Message']
+__all__ = ["Message"]
+
 
 class Room(models.Model):
-    user_one = models.ForeignKey(Profile, related_name="user_one", verbose_name='user 1', on_delete=CASCADE)
-    user_two = models.ForeignKey(Profile, related_name="user_two", verbose_name='user 2', on_delete=CASCADE)
+    user_one = models.ForeignKey(
+        Profile, related_name="user_one", verbose_name="user 1", on_delete=CASCADE
+    )
+    user_two = models.ForeignKey(
+        Profile, related_name="user_two", verbose_name="user 2", on_delete=CASCADE
+    )
 
     def contain(self, profile):
         return self.user_one == profile or self.user_two == profile
+
     def other_user(self, profile):
         return self.user_one if profile == self.user_two else self.user_two
+
     def users(self):
         return [self.user_one, self.user_two]
 
+
 class Message(models.Model):
-    author = models.ForeignKey(Profile, verbose_name=_('user'), on_delete=CASCADE)
-    time = models.DateTimeField(verbose_name=_('posted time'), auto_now_add=True)
-    body = models.TextField(verbose_name=_('body of comment'), max_length=8192)
-    hidden = models.BooleanField(verbose_name='is hidden', default=False)
-    room = models.ForeignKey(Room, verbose_name='room id', on_delete=CASCADE, default=None, null=True)
+    author = models.ForeignKey(Profile, verbose_name=_("user"), on_delete=CASCADE)
+    time = models.DateTimeField(verbose_name=_("posted time"), auto_now_add=True)
+    body = models.TextField(verbose_name=_("body of comment"), max_length=8192)
+    hidden = models.BooleanField(verbose_name="is hidden", default=False)
+    room = models.ForeignKey(
+        Room, verbose_name="room id", on_delete=CASCADE, default=None, null=True
+    )
 
     def save(self, *args, **kwargs):
         new_message = self.id
@@ -32,26 +42,37 @@ class Message(models.Model):
         super(Message, self).save(*args, **kwargs)
 
     class Meta:
-        app_label = 'chat_box'
-        verbose_name = 'message'
-        verbose_name_plural = 'messages'
-        ordering = ('-time',)
+        app_label = "chat_box"
+        verbose_name = "message"
+        verbose_name_plural = "messages"
+        ordering = ("-time",)
+
 
 class UserRoom(models.Model):
-    user = models.ForeignKey(Profile, verbose_name=_('user'), on_delete=CASCADE)
-    room = models.ForeignKey(Room, verbose_name='room id', on_delete=CASCADE, default=None, null=True)
-    last_seen = models.DateTimeField(verbose_name=_('last seen'), auto_now_add=True)
+    user = models.ForeignKey(Profile, verbose_name=_("user"), on_delete=CASCADE)
+    room = models.ForeignKey(
+        Room, verbose_name="room id", on_delete=CASCADE, default=None, null=True
+    )
+    last_seen = models.DateTimeField(verbose_name=_("last seen"), auto_now_add=True)
 
 
 class Ignore(models.Model):
-    user = models.ForeignKey(Profile, related_name="ignored_chat_users", verbose_name=_('user'), on_delete=CASCADE)
+    user = models.ForeignKey(
+        Profile,
+        related_name="ignored_chat_users",
+        verbose_name=_("user"),
+        on_delete=CASCADE,
+    )
     ignored_users = models.ManyToManyField(Profile)
 
     @classmethod
     def is_ignored(self, current_user, new_friend):
         try:
-            return current_user.ignored_chat_users.get().ignored_users \
-                        .filter(id=new_friend.id).exists()
+            return (
+                current_user.ignored_chat_users.get()
+                .ignored_users.filter(id=new_friend.id)
+                .exists()
+            )
         except:
             return False
 
@@ -64,21 +85,17 @@ class Ignore(models.Model):
 
     @classmethod
     def add_ignore(self, current_user, friend):
-        ignore, created = self.objects.get_or_create(
-            user = current_user
-        )
+        ignore, created = self.objects.get_or_create(user=current_user)
         ignore.ignored_users.add(friend)
 
     @classmethod
     def remove_ignore(self, current_user, friend):
-        ignore, created = self.objects.get_or_create(
-            user = current_user
-        )
+        ignore, created = self.objects.get_or_create(user=current_user)
         ignore.ignored_users.remove(friend)
 
     @classmethod
     def toggle_ignore(self, current_user, friend):
-        if (self.is_ignored(current_user, friend)):
+        if self.is_ignored(current_user, friend):
             self.remove_ignore(current_user, friend)
         else:
             self.add_ignore(current_user, friend)

chat_box/utils.py

@@ -5,14 +5,16 @@ from django.conf import settings
 secret_key = settings.CHAT_SECRET_KEY
 fernet = Fernet(secret_key)
 
+
 def encrypt_url(creator_id, other_id):
-    message = str(creator_id) + '_' + str(other_id)
+    message = str(creator_id) + "_" + str(other_id)
     return fernet.encrypt(message.encode()).decode()
 
+
 def decrypt_url(message_encrypted):
     try:
         dec_message = fernet.decrypt(message_encrypted.encode()).decode()
-        creator_id, other_id = dec_message.split('_')
+        creator_id, other_id = dec_message.split("_")
         return int(creator_id), int(other_id)
     except Exception as e:
         return None, None

chat_box/views.py

@@ -1,11 +1,27 @@
 from django.utils.translation import gettext as _
 from django.views.generic import ListView
-from django.http import HttpResponse, JsonResponse, HttpResponseBadRequest, HttpResponsePermanentRedirect, HttpResponseRedirect
+from django.http import (
+    HttpResponse,
+    JsonResponse,
+    HttpResponseBadRequest,
+    HttpResponsePermanentRedirect,
+    HttpResponseRedirect,
+)
 from django.core.paginator import Paginator
 from django.core.exceptions import PermissionDenied
 from django.shortcuts import render
 from django.forms.models import model_to_dict
-from django.db.models import Case, BooleanField, When, Q, Subquery, OuterRef, Exists, Count, IntegerField
+from django.db.models import (
+    Case,
+    BooleanField,
+    When,
+    Q,
+    Subquery,
+    OuterRef,
+    Exists,
+    Count,
+    IntegerField,
+)
 from django.db.models.functions import Coalesce
 from django.utils import timezone
 from django.contrib.auth.decorators import login_required
@@ -24,9 +40,9 @@ import json
 
 
 class ChatView(ListView):
-    context_object_name = 'message'
-    template_name = 'chat/chat.html'
-    title = _('Chat Box')
+    context_object_name = "message"
+    template_name = "chat/chat.html"
+    title = _("Chat Box")
 
     def __init__(self):
         super().__init__()
@@ -40,8 +56,8 @@ class ChatView(ListView):
         return self.messages
 
     def get(self, request, *args, **kwargs):
-        request_room = kwargs['room_id']
-        page = request.GET.get('page')
+        request_room = kwargs["room_id"]
+        page = request.GET.get("page")
 
         if request_room:
             try:
@@ -64,45 +80,51 @@ class ChatView(ListView):
 
         cur_page = self.paginator.get_page(page)
 
-        return render(request, 'chat/message_list.html', {
-            'object_list': cur_page.object_list,
-            'num_pages': self.paginator.num_pages
-        })
+        return render(
+            request,
+            "chat/message_list.html",
+            {
+                "object_list": cur_page.object_list,
+                "num_pages": self.paginator.num_pages,
+            },
+        )
 
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
 
-        context['title'] = self.title
-        context['last_msg'] = event.last()
-        context['status_sections'] = get_status_context(self.request)
-        context['room'] = self.room_id
-        context['unread_count_lobby'] = get_unread_count(None, self.request.profile)
+        context["title"] = self.title
+        context["last_msg"] = event.last()
+        context["status_sections"] = get_status_context(self.request)
+        context["room"] = self.room_id
+        context["unread_count_lobby"] = get_unread_count(None, self.request.profile)
         if self.room:
             users_room = [self.room.user_one, self.room.user_two]
             users_room.remove(self.request.profile)
-            context['other_user'] =  users_room[0]
-            context['other_online'] = get_user_online_status(context['other_user'])
-            context['is_ignored'] = Ignore.is_ignored(self.request.profile, context['other_user'])
+            context["other_user"] = users_room[0]
+            context["other_online"] = get_user_online_status(context["other_user"])
+            context["is_ignored"] = Ignore.is_ignored(
+                self.request.profile, context["other_user"]
+            )
         else:
-            context['online_count'] = get_online_count()
-        context['message_template'] = {
-            'author': self.request.profile,
-            'id': '$id',
-            'time': timezone.now(),
-            'body': '$body'
+            context["online_count"] = get_online_count()
+        context["message_template"] = {
+            "author": self.request.profile,
+            "id": "$id",
+            "time": timezone.now(),
+            "body": "$body",
         }
         return context
 
 
 def delete_message(request):
-    ret = {'delete': 'done'}
+    ret = {"delete": "done"}
 
-    if request.method == 'GET':
+    if request.method == "GET":
         return JsonResponse(ret)
 
     if request.user.is_staff:
         try:
-            messid = int(request.POST.get('message'))
+            messid = int(request.POST.get("message"))
             mess = Message.objects.get(id=messid)
         except:
             return HttpResponseBadRequest()
@@ -117,56 +139,62 @@ def delete_message(request):
 
 @login_required
 def post_message(request):
-    ret = {'msg': 'posted'}
-    if request.method != 'POST':
+    ret = {"msg": "posted"}
+    if request.method != "POST":
         return HttpResponseBadRequest()
-    if len(request.POST['body']) > 5000:
+    if len(request.POST["body"]) > 5000:
         return HttpResponseBadRequest()
 
     room = None
-    if request.POST['room']:
-        room = Room.objects.get(id=request.POST['room'])
+    if request.POST["room"]:
+        room = Room.objects.get(id=request.POST["room"])
 
     if not can_access_room(request, room) or request.profile.mute:
         return HttpResponseBadRequest()
 
-    new_message = Message(author=request.profile,
-                          body=request.POST['body'],
-                          room=room)
+    new_message = Message(author=request.profile, body=request.POST["body"], room=room)
     new_message.save()
 
     if not room:
-        event.post('chat_lobby', {
-            'type': 'lobby',
-            'author_id': request.profile.id, 
-            'message': new_message.id,
-            'room': 'None',
-            'tmp_id': request.POST.get('tmp_id')
-        })
+        event.post(
+            "chat_lobby",
+            {
+                "type": "lobby",
+                "author_id": request.profile.id,
+                "message": new_message.id,
+                "room": "None",
+                "tmp_id": request.POST.get("tmp_id"),
+            },
+        )
     else:
         for user in room.users():
-            event.post('chat_' + str(user.id), {
-                'type': 'private',
-                'author_id': request.profile.id, 
-                'message': new_message.id,
-                'room': room.id,
-                'tmp_id': request.POST.get('tmp_id')
-            })   
+            event.post(
+                "chat_" + str(user.id),
+                {
+                    "type": "private",
+                    "author_id": request.profile.id,
+                    "message": new_message.id,
+                    "room": room.id,
+                    "tmp_id": request.POST.get("tmp_id"),
+                },
+            )
 
     return JsonResponse(ret)
 
 
 def can_access_room(request, room):
-    return not room or room.user_one == request.profile or room.user_two == request.profile
+    return (
+        not room or room.user_one == request.profile or room.user_two == request.profile
+    )
 
 
 @login_required
 def chat_message_ajax(request):
-    if request.method != 'GET':
+    if request.method != "GET":
         return HttpResponseBadRequest()
 
     try:
-        message_id = request.GET['message']
+        message_id = request.GET["message"]
     except KeyError:
         return HttpResponseBadRequest()
 
@@ -174,22 +202,26 @@ def chat_message_ajax(request):
         message = Message.objects.filter(hidden=False).get(id=message_id)
         room = message.room
         if room and not room.contain(request.profile):
-            return HttpResponse('Unauthorized', status=401)
+            return HttpResponse("Unauthorized", status=401)
     except Message.DoesNotExist:
         return HttpResponseBadRequest()
-    return render(request, 'chat/message.html', {
-        'message': message,
-    })
+    return render(
+        request,
+        "chat/message.html",
+        {
+            "message": message,
+        },
+    )
 
 
 @login_required
 def update_last_seen(request, **kwargs):
-    if 'room_id' in kwargs:
-        room_id = kwargs['room_id']
-    elif request.method == 'GET':
-        room_id = request.GET.get('room')
-    elif request.method == 'POST':
-        room_id = request.POST.get('room')
+    if "room_id" in kwargs:
+        room_id = kwargs["room_id"]
+    elif request.method == "GET":
+        room_id = request.GET.get("room")
+    elif request.method == "POST":
+        room_id = request.POST.get("room")
     else:
         return HttpResponseBadRequest()
 
@@ -210,7 +242,7 @@ def update_last_seen(request, **kwargs):
     user_room.last_seen = timezone.now()
     user_room.save()
 
-    return JsonResponse({'msg': 'updated'})
+    return JsonResponse({"msg": "updated"})
 
 
 def get_online_count():
@@ -225,10 +257,10 @@ def get_user_online_status(user):
 
 
 def user_online_status_ajax(request):
-    if request.method != 'GET':
+    if request.method != "GET":
         return HttpResponseBadRequest()
 
-    user_id = request.GET.get('user')
+    user_id = request.GET.get("user")
 
     if user_id:
         try:
@@ -238,15 +270,23 @@ def user_online_status_ajax(request):
             return HttpResponseBadRequest()
 
         is_online = get_user_online_status(user)
-        return render(request, 'chat/user_online_status.html', {
-                'other_user': user,
-                'other_online': is_online,
-                'is_ignored': Ignore.is_ignored(request.profile, user)
-            })
+        return render(
+            request,
+            "chat/user_online_status.html",
+            {
+                "other_user": user,
+                "other_online": is_online,
+                "is_ignored": Ignore.is_ignored(request.profile, user),
+            },
+        )
     else:
-        return render(request, 'chat/user_online_status.html', {
-                'online_count': get_online_count(),
-            })
+        return render(
+            request,
+            "chat/user_online_status.html",
+            {
+                "online_count": get_online_count(),
+            },
+        )
 
 
 def get_online_status(request_user, queryset, rooms=None):
@@ -259,16 +299,16 @@ def get_online_status(request_user, queryset, rooms=None):
         unread_count = get_unread_count(rooms, request_user)
         count = {}
         for i in unread_count:
-            count[i['other_user']] = i['unread_count']
+            count[i["other_user"]] = i["unread_count"]
 
     for user in queryset:
         is_online = False
-        if (user.last_access >= last_two_minutes):
+        if user.last_access >= last_two_minutes:
             is_online = True
-        user_dict = {'user': user, 'is_online': is_online}
+        user_dict = {"user": user, "is_online": is_online}
         if rooms and user.id in count:
-            user_dict['unread_count'] = count[user.id]
-        user_dict['url'] = encrypt_url(request_user.id, user.id)
+            user_dict["unread_count"] = count[user.id]
+        user_dict["url"] = encrypt_url(request_user.id, user.id)
         ret.append(user_dict)
     return ret
 
@@ -282,65 +322,81 @@ def get_status_context(request, include_ignored=False):
         queryset = Profile.objects.exclude(id__in=ignored_users)
 
     last_two_minutes = timezone.now() - timezone.timedelta(minutes=2)
-    recent_profile = Room.objects.filter(
-            Q(user_one=request.profile) | Q(user_two=request.profile)
-        ).annotate(
+    recent_profile = (
+        Room.objects.filter(Q(user_one=request.profile) | Q(user_two=request.profile))
+        .annotate(
             last_msg_time=Subquery(
-                Message.objects.filter(room=OuterRef('pk')).values('time')[:1]
+                Message.objects.filter(room=OuterRef("pk")).values("time")[:1]
             ),
             other_user=Case(
-                When(user_one=request.profile, then='user_two'),
-                default='user_one',
+                When(user_one=request.profile, then="user_two"),
+                default="user_one",
+            ),
+        )
+        .filter(last_msg_time__isnull=False)
+        .exclude(other_user__in=ignored_users)
+        .order_by("-last_msg_time")
+        .values("other_user", "id")[:20]
     )
-        ).filter(last_msg_time__isnull=False)\
-        .exclude(other_user__in=ignored_users)\
-        .order_by('-last_msg_time').values('other_user', 'id')[:20]
 
-    recent_profile_id = [str(i['other_user']) for i in recent_profile]
-    joined_id = ','.join(recent_profile_id)
-    recent_rooms = [int(i['id']) for i in recent_profile]
+    recent_profile_id = [str(i["other_user"]) for i in recent_profile]
+    joined_id = ",".join(recent_profile_id)
+    recent_rooms = [int(i["id"]) for i in recent_profile]
     recent_list = None
     if joined_id:
         recent_list = Profile.objects.raw(
-            f'SELECT * from judge_profile where id in ({joined_id}) order by field(id,{joined_id})')
-    friend_list = Friend.get_friend_profiles(request.profile).exclude(id__in=recent_profile_id)\
-                    .exclude(id__in=ignored_users)\
-                    .order_by('-last_access')
-    admin_list = queryset.filter(display_rank='admin')\
-                .exclude(id__in=friend_list).exclude(id__in=recent_profile_id)
-    all_user_status = queryset\
-        .filter(display_rank='user',
-        last_access__gte = last_two_minutes)\
-        .annotate(is_online=Case(default=True,output_field=BooleanField()))\
-        .order_by('-rating').exclude(id__in=friend_list).exclude(id__in=admin_list)\
+            f"SELECT * from judge_profile where id in ({joined_id}) order by field(id,{joined_id})"
+        )
+    friend_list = (
+        Friend.get_friend_profiles(request.profile)
+        .exclude(id__in=recent_profile_id)
+        .exclude(id__in=ignored_users)
+        .order_by("-last_access")
+    )
+    admin_list = (
+        queryset.filter(display_rank="admin")
+        .exclude(id__in=friend_list)
+        .exclude(id__in=recent_profile_id)
+    )
+    all_user_status = (
+        queryset.filter(display_rank="user", last_access__gte=last_two_minutes)
+        .annotate(is_online=Case(default=True, output_field=BooleanField()))
+        .order_by("-rating")
+        .exclude(id__in=friend_list)
+        .exclude(id__in=admin_list)
         .exclude(id__in=recent_profile_id)[:30]
+    )
 
     return [
         {
-            'title': 'Recent',
-            'user_list': get_online_status(request.profile, recent_list, recent_rooms),
+            "title": "Recent",
+            "user_list": get_online_status(request.profile, recent_list, recent_rooms),
         },
         {
-            'title': 'Following',
-            'user_list': get_online_status(request.profile, friend_list),
+            "title": "Following",
+            "user_list": get_online_status(request.profile, friend_list),
         },
         {
-            'title': 'Admin',
-            'user_list': get_online_status(request.profile, admin_list),
+            "title": "Admin",
+            "user_list": get_online_status(request.profile, admin_list),
         },
         {
-            'title': 'Other',
-            'user_list': get_online_status(request.profile, all_user_status),
+            "title": "Other",
+            "user_list": get_online_status(request.profile, all_user_status),
         },
     ]
 
 
 @login_required
 def online_status_ajax(request):
-    return render(request, 'chat/online_status.html', {
-            'status_sections': get_status_context(request),
-            'unread_count_lobby': get_unread_count(None, request.profile),
-        })
+    return render(
+        request,
+        "chat/online_status.html",
+        {
+            "status_sections": get_status_context(request),
+            "unread_count_lobby": get_unread_count(None, request.profile),
+        },
+    )
 
 
 @login_required
@@ -353,10 +409,10 @@ def get_room(user_one, user_two):
 
 @login_required
 def get_or_create_room(request):
-    if request.method == 'GET':
-        decrypted_other_id = request.GET.get('other')
-    elif request.method == 'POST':
-        decrypted_other_id = request.POST.get('other')
+    if request.method == "GET":
+        decrypted_other_id = request.GET.get("other")
+    elif request.method == "POST":
+        decrypted_other_id = request.POST.get("other")
     else:
         return HttpResponseBadRequest()
 
@@ -382,47 +438,60 @@ def get_or_create_room(request):
             user_room.last_seen = timezone.now()
             user_room.save()
 
-    if request.method == 'GET':
-        return JsonResponse({'room': room.id, 'other_user_id': other_user.id})
-    return HttpResponseRedirect(reverse('chat', kwargs={'room_id': room.id}))
+    if request.method == "GET":
+        return JsonResponse({"room": room.id, "other_user_id": other_user.id})
+    return HttpResponseRedirect(reverse("chat", kwargs={"room_id": room.id}))
 
 
 def get_unread_count(rooms, user):
     if rooms:
-        mess = Message.objects.filter(room=OuterRef('room'),
-                                      time__gte=OuterRef('last_seen'))\
-                .exclude(author=user)\
-                .order_by().values('room')\
-                .annotate(unread_count=Count('pk')).values('unread_count')
+        mess = (
+            Message.objects.filter(
+                room=OuterRef("room"), time__gte=OuterRef("last_seen")
+            )
+            .exclude(author=user)
+            .order_by()
+            .values("room")
+            .annotate(unread_count=Count("pk"))
+            .values("unread_count")
+        )
 
-        return UserRoom.objects\
-            .filter(user=user, room__in=rooms)\
+        return (
+            UserRoom.objects.filter(user=user, room__in=rooms)
             .annotate(
                 unread_count=Coalesce(Subquery(mess, output_field=IntegerField()), 0),
                 other_user=Case(
-                    When(room__user_one=user, then='room__user_two'),
-                    default='room__user_one',
+                    When(room__user_one=user, then="room__user_two"),
+                    default="room__user_one",
+                ),
+            )
+            .filter(unread_count__gte=1)
+            .values("other_user", "unread_count")
         )
-            ).filter(unread_count__gte=1).values('other_user', 'unread_count')
     else:  # lobby
-        mess = Message.objects.filter(room__isnull=True,
-                                      time__gte=OuterRef('last_seen'))\
-                .exclude(author=user)\
-                .order_by().values('room')\
-                .annotate(unread_count=Count('pk')).values('unread_count')
+        mess = (
+            Message.objects.filter(room__isnull=True, time__gte=OuterRef("last_seen"))
+            .exclude(author=user)
+            .order_by()
+            .values("room")
+            .annotate(unread_count=Count("pk"))
+            .values("unread_count")
+        )
 
-        res = UserRoom.objects\
-            .filter(user=user, room__isnull=True)\
+        res = (
+            UserRoom.objects.filter(user=user, room__isnull=True)
             .annotate(
                 unread_count=Coalesce(Subquery(mess, output_field=IntegerField()), 0),
-            ).values_list('unread_count', flat=True)
+            )
+            .values_list("unread_count", flat=True)
+        )
 
         return res[0] if len(res) else 0
 
 
 @login_required
 def toggle_ignore(request, **kwargs):
-    user_id = kwargs['user_id']
+    user_id = kwargs["user_id"]
     if not user_id:
         return HttpResponseBadRequest()
     try:
@@ -431,28 +500,34 @@ def toggle_ignore(request, **kwargs):
         return HttpResponseBadRequest()
 
     Ignore.toggle_ignore(request.profile, other_user)
-    next_url = request.GET.get('next', '/')
+    next_url = request.GET.get("next", "/")
     return HttpResponseRedirect(next_url)
 
 
 @login_required
 def get_unread_boxes(request):
-    if (request.method != 'GET'):
+    if request.method != "GET":
         return HttpResponseBadRequest()
 
     ignored_users = Ignore.get_ignored_users(request.profile)
 
-    mess = Message.objects.filter(room=OuterRef('room'),
-                                  time__gte=OuterRef('last_seen'))\
-            .exclude(author=request.profile)\
-            .exclude(author__in=ignored_users)\
-            .order_by().values('room')\
-            .annotate(unread_count=Count('pk')).values('unread_count')
+    mess = (
+        Message.objects.filter(room=OuterRef("room"), time__gte=OuterRef("last_seen"))
+        .exclude(author=request.profile)
+        .exclude(author__in=ignored_users)
+        .order_by()
+        .values("room")
+        .annotate(unread_count=Count("pk"))
+        .values("unread_count")
+    )
 
-    unread_boxes = UserRoom.objects\
-        .filter(user=request.profile, room__isnull=False)\
+    unread_boxes = (
+        UserRoom.objects.filter(user=request.profile, room__isnull=False)
         .annotate(
             unread_count=Coalesce(Subquery(mess, output_field=IntegerField()), 0),
-        ).filter(unread_count__gte=1).count()
+        )
+        .filter(unread_count__gte=1)
+        .count()
+    )
 
-    return JsonResponse({'unread_boxes': unread_boxes})
+    return JsonResponse({"unread_boxes": unread_boxes})

django_2_2_pymysql_patch.py

@@ -12,6 +12,6 @@ if (2, 2) <= django.VERSION < (3,):
         # attribute where the exact query sent to the database is saved.
         # See MySQLdb/cursors.py in the source distribution.
         # MySQLdb returns string, PyMySQL bytes.
-        return force_text(getattr(cursor, '_executed', None), errors='replace')
+        return force_text(getattr(cursor, "_executed", None), errors="replace")
 
     DatabaseOperations.last_executed_query = last_executed_query

django_ace/widgets.py

@@ -11,8 +11,17 @@ from django.utils.safestring import mark_safe
 
 
 class AceWidget(forms.Textarea):
-    def __init__(self, mode=None, theme=None, wordwrap=False, width='100%', height='300px',
-                 no_ace_media=False, *args, **kwargs):
+    def __init__(
+        self,
+        mode=None,
+        theme=None,
+        wordwrap=False,
+        width="100%",
+        height="300px",
+        no_ace_media=False,
+        *args,
+        **kwargs
+    ):
         self.mode = mode
         self.theme = theme
         self.wordwrap = wordwrap
@@ -23,10 +32,10 @@ class AceWidget(forms.Textarea):
 
     @property
     def media(self):
-        js = [urljoin(settings.ACE_URL, 'ace.js')] if self.ace_media else []
-        js.append('django_ace/widget.js')
+        js = [urljoin(settings.ACE_URL, "ace.js")] if self.ace_media else []
+        js.append("django_ace/widget.js")
         css = {
-            'screen': ['django_ace/widget.css'],
+            "screen": ["django_ace/widget.css"],
         }
         return forms.Media(js=js, css=css)
 
@@ -34,24 +43,28 @@ class AceWidget(forms.Textarea):
         attrs = attrs or {}
 
         ace_attrs = {
-            'class': 'django-ace-widget loading',
-            'style': 'width:%s; height:%s' % (self.width, self.height),
-            'id': 'ace_%s' % name,
+            "class": "django-ace-widget loading",
+            "style": "width:%s; height:%s" % (self.width, self.height),
+            "id": "ace_%s" % name,
         }
         if self.mode:
-            ace_attrs['data-mode'] = self.mode
+            ace_attrs["data-mode"] = self.mode
         if self.theme:
-            ace_attrs['data-theme'] = self.theme
+            ace_attrs["data-theme"] = self.theme
         if self.wordwrap:
-            ace_attrs['data-wordwrap'] = 'true'
+            ace_attrs["data-wordwrap"] = "true"
 
-        attrs.update(style='width: 100%; min-width: 100%; max-width: 100%; resize: none')
+        attrs.update(
+            style="width: 100%; min-width: 100%; max-width: 100%; resize: none"
+        )
         textarea = super(AceWidget, self).render(name, value, attrs)
 
-        html = '<div%s><div></div></div>%s' % (flatatt(ace_attrs), textarea)
+        html = "<div%s><div></div></div>%s" % (flatatt(ace_attrs), textarea)
 
         # add toolbar
-        html = ('<div class="django-ace-editor"><div style="width: 100%%" class="django-ace-toolbar">'
-                '<a href="./" class="django-ace-max_min"></a></div>%s</div>') % html
+        html = (
+            '<div class="django-ace-editor"><div style="width: 100%%" class="django-ace-toolbar">'
+            '<a href="./" class="django-ace-max_min"></a></div>%s</div>'
+        ) % html
 
         return mark_safe(html)

dmoj/celery.py

@@ -4,24 +4,30 @@ import socket
 from celery import Celery
 from celery.signals import task_failure
 
-app = Celery('dmoj')
+app = Celery("dmoj")
 
 from django.conf import settings  # noqa: E402, I202, django must be imported here
-app.config_from_object(settings, namespace='CELERY')
 
-if hasattr(settings, 'CELERY_BROKER_URL_SECRET'):
+app.config_from_object(settings, namespace="CELERY")
+
+if hasattr(settings, "CELERY_BROKER_URL_SECRET"):
     app.conf.broker_url = settings.CELERY_BROKER_URL_SECRET
-if hasattr(settings, 'CELERY_RESULT_BACKEND_SECRET'):
+if hasattr(settings, "CELERY_RESULT_BACKEND_SECRET"):
     app.conf.result_backend = settings.CELERY_RESULT_BACKEND_SECRET
 
 # Load task modules from all registered Django app configs.
 app.autodiscover_tasks()
 
 # Logger to enable errors be reported.
-logger = logging.getLogger('judge.celery')
+logger = logging.getLogger("judge.celery")
 
 
 @task_failure.connect()
 def celery_failure_log(sender, task_id, exception, traceback, *args, **kwargs):
-    logger.error('Celery Task %s: %s on %s', sender.name, task_id, socket.gethostname(),  # noqa: G201
-                 exc_info=(type(exception), exception, traceback))
+    logger.error(
+        "Celery Task %s: %s on %s",
+        sender.name,
+        task_id,
+        socket.gethostname(),  # noqa: G201
+        exc_info=(type(exception), exception, traceback),
+    )

dmoj/decorators.py

@@ -1,12 +1,14 @@
 import time
 
+
 def timeit(method):
     def timed(*args, **kw):
         ts = time.time()
         result = method(*args, **kw)
         te = time.time()
-        if 'log_time' in kw:
-            name = kw.get('log_name', method.__name__.upper())
-            kw['log_time'][name] = int((te - ts) * 1000)
+        if "log_time" in kw:
+            name = kw.get("log_name", method.__name__.upper())
+            kw["log_time"][name] = int((te - ts) * 1000)
         return result
+
     return timed

dmoj/settings.py

@@ -22,7 +22,7 @@ BASE_DIR = os.path.dirname(os.path.dirname(__file__))
 # See https://docs.djangoproject.com/en/1.11/howto/deployment/checklist/
 
 # SECURITY WARNING: keep the secret key used in production secret!
-SECRET_KEY = '5*9f5q57mqmlz2#f$x1h76&jxy#yortjl1v+l*6hd18$d*yx#0'
+SECRET_KEY = "5*9f5q57mqmlz2#f$x1h76&jxy#yortjl1v+l*6hd18$d*yx#0"
 
 # SECURITY WARNING: don't run with debug turned on in production!
 DEBUG = True
@@ -30,8 +30,8 @@ DEBUG = True
 ALLOWED_HOSTS = []
 
 SITE_ID = 1
-SITE_NAME = 'LQDOJ'
-SITE_LONG_NAME = 'LQDOJ: Le Quy Don Online Judge'
+SITE_NAME = "LQDOJ"
+SITE_LONG_NAME = "LQDOJ: Le Quy Don Online Judge"
 SITE_ADMIN_EMAIL = False
 
 DMOJ_REQUIRE_STAFF_2FA = True
@@ -46,11 +46,13 @@ DMOJ_PP_STEP = 0.95
 DMOJ_PP_ENTRIES = 100
 DMOJ_PP_BONUS_FUNCTION = lambda n: 300 * (1 - 0.997**n)  # noqa: E731
 
-NODEJS = '/usr/bin/node'
-EXIFTOOL = '/usr/bin/exiftool'
-ACE_URL = '//cdnjs.cloudflare.com/ajax/libs/ace/1.1.3'
-SELECT2_JS_URL = '//cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/js/select2.min.js'
-DEFAULT_SELECT2_CSS = '//cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/css/select2.min.css'
+NODEJS = "/usr/bin/node"
+EXIFTOOL = "/usr/bin/exiftool"
+ACE_URL = "//cdnjs.cloudflare.com/ajax/libs/ace/1.1.3"
+SELECT2_JS_URL = "//cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/js/select2.min.js"
+DEFAULT_SELECT2_CSS = (
+    "//cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/css/select2.min.css"
+)
 
 DMOJ_CAMO_URL = None
 DMOJ_CAMO_KEY = None
@@ -74,14 +76,14 @@ DMOJ_BLOG_RECENTLY_ATTEMPTED_PROBLEMS_COUNT = 7
 DMOJ_TOTP_TOLERANCE_HALF_MINUTES = 1
 DMOJ_USER_MAX_ORGANIZATION_COUNT = 10
 DMOJ_COMMENT_VOTE_HIDE_THRESHOLD = -5
-DMOJ_PDF_PROBLEM_CACHE = ''
+DMOJ_PDF_PROBLEM_CACHE = ""
 DMOJ_PDF_PROBLEM_TEMP_DIR = tempfile.gettempdir()
 DMOJ_STATS_SUBMISSION_RESULT_COLORS = {
-    'TLE': '#a3bcbd',
-    'AC': '#00a92a',
-    'WA': '#ed4420',
-    'CE': '#42586d',
-    'ERR': '#ffa71c',
+    "TLE": "#a3bcbd",
+    "AC": "#00a92a",
+    "WA": "#ed4420",
+    "CE": "#42586d",
+    "ERR": "#ffa71c",
 }
 
 MARKDOWN_STYLES = {}
@@ -90,14 +92,14 @@ MARKDOWN_DEFAULT_STYLE = {}
 MATHOID_URL = False
 MATHOID_GZIP = False
 MATHOID_MML_CACHE = None
-MATHOID_CSS_CACHE = 'default'
-MATHOID_DEFAULT_TYPE = 'auto'
+MATHOID_CSS_CACHE = "default"
+MATHOID_DEFAULT_TYPE = "auto"
 MATHOID_MML_CACHE_TTL = 86400
-MATHOID_CACHE_ROOT = tempfile.gettempdir() + '/mathoidCache'
+MATHOID_CACHE_ROOT = tempfile.gettempdir() + "/mathoidCache"
 MATHOID_CACHE_URL = False
 
 TEXOID_GZIP = False
-TEXOID_META_CACHE = 'default'
+TEXOID_META_CACHE = "default"
 TEXOID_META_CACHE_TTL = 86400
 DMOJ_NEWSLETTER_ID_ON_REGISTER = 1
 
@@ -110,31 +112,33 @@ TIMEZONE_MAP = None
 TIMEZONE_DETECT_BACKEND = None
 
 TERMS_OF_SERVICE_URL = None
-DEFAULT_USER_LANGUAGE = 'PY3'
+DEFAULT_USER_LANGUAGE = "PY3"
 
-PHANTOMJS = ''
+PHANTOMJS = ""
 PHANTOMJS_PDF_ZOOM = 0.75
 PHANTOMJS_PDF_TIMEOUT = 5.0
-PHANTOMJS_PAPER_SIZE = 'Letter'
+PHANTOMJS_PAPER_SIZE = "Letter"
 
-SLIMERJS = ''
+SLIMERJS = ""
 SLIMERJS_PDF_ZOOM = 0.75
-SLIMERJS_FIREFOX_PATH = ''
-SLIMERJS_PAPER_SIZE = 'Letter'
+SLIMERJS_FIREFOX_PATH = ""
+SLIMERJS_PAPER_SIZE = "Letter"
 
-PUPPETEER_MODULE = '/usr/lib/node_modules/puppeteer'
-PUPPETEER_PAPER_SIZE = 'Letter'
+PUPPETEER_MODULE = "/usr/lib/node_modules/puppeteer"
+PUPPETEER_PAPER_SIZE = "Letter"
 
 USE_SELENIUM = False
 SELENIUM_CUSTOM_CHROME_PATH = None
-SELENIUM_CHROMEDRIVER_PATH = 'chromedriver'
+SELENIUM_CHROMEDRIVER_PATH = "chromedriver"
 
-PYGMENT_THEME = 'pygment-github.css'
+PYGMENT_THEME = "pygment-github.css"
 INLINE_JQUERY = True
 INLINE_FONTAWESOME = True
-JQUERY_JS = '//ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js'
-FONTAWESOME_CSS = '//maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css'
-DMOJ_CANONICAL = ''
+JQUERY_JS = "//ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"
+FONTAWESOME_CSS = (
+    "//maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css"
+)
+DMOJ_CANONICAL = ""
 
 # Application definition
 
@@ -146,130 +150,130 @@ except ImportError:
     pass
 else:
     del wpadmin
-    INSTALLED_APPS += ('wpadmin',)
+    INSTALLED_APPS += ("wpadmin",)
 
     WPADMIN = {
-        'admin': {
-            'title': 'LQDOJ Admin',
-            'menu': {
-                'top': 'wpadmin.menu.menus.BasicTopMenu',
-                'left': 'wpadmin.menu.custom.CustomModelLeftMenuWithDashboard',
+        "admin": {
+            "title": "LQDOJ Admin",
+            "menu": {
+                "top": "wpadmin.menu.menus.BasicTopMenu",
+                "left": "wpadmin.menu.custom.CustomModelLeftMenuWithDashboard",
             },
-            'custom_menu': [
+            "custom_menu": [
                 {
-                    'model': 'judge.Problem',
-                    'icon': 'fa-question-circle',
-                    'children': [
-                        'judge.ProblemGroup',
-                        'judge.ProblemType',
-                        'judge.ProblemPointsVote',
+                    "model": "judge.Problem",
+                    "icon": "fa-question-circle",
+                    "children": [
+                        "judge.ProblemGroup",
+                        "judge.ProblemType",
+                        "judge.ProblemPointsVote",
                     ],
                 },
                 {
-                    'model': 'judge.Submission',
-                    'icon': 'fa-check-square-o',
-                    'children': [
-                        'judge.Language',
-                        'judge.Judge',
+                    "model": "judge.Submission",
+                    "icon": "fa-check-square-o",
+                    "children": [
+                        "judge.Language",
+                        "judge.Judge",
                     ],
                 },
                 {
-                    'model': 'judge.Contest',
-                    'icon': 'fa-bar-chart',
-                    'children': [
-                        'judge.ContestParticipation',
-                        'judge.ContestTag',
+                    "model": "judge.Contest",
+                    "icon": "fa-bar-chart",
+                    "children": [
+                        "judge.ContestParticipation",
+                        "judge.ContestTag",
                     ],
                 },
                 {
-                    'model': 'auth.User',
-                    'icon': 'fa-user',
-                    'children': [
-                        'auth.Group',
-                        'registration.RegistrationProfile',
+                    "model": "auth.User",
+                    "icon": "fa-user",
+                    "children": [
+                        "auth.Group",
+                        "registration.RegistrationProfile",
                     ],
                 },
                 {
-                    'model': 'judge.Profile',
-                    'icon': 'fa-user-plus',
-                    'children': [
-                        'judge.Organization',
-                        'judge.OrganizationRequest',
+                    "model": "judge.Profile",
+                    "icon": "fa-user-plus",
+                    "children": [
+                        "judge.Organization",
+                        "judge.OrganizationRequest",
                     ],
                 },
                 {
-                    'model': 'judge.NavigationBar',
-                    'icon': 'fa-bars',
-                    'children': [
-                        'judge.MiscConfig',
-                        'judge.License',
-                        'sites.Site',
-                        'redirects.Redirect',
+                    "model": "judge.NavigationBar",
+                    "icon": "fa-bars",
+                    "children": [
+                        "judge.MiscConfig",
+                        "judge.License",
+                        "sites.Site",
+                        "redirects.Redirect",
                     ],
                 },
-                ('judge.BlogPost', 'fa-rss-square'),
-                ('judge.Comment', 'fa-comment-o'),
-                ('judge.Ticket', 'fa-exclamation-circle'),
-                ('flatpages.FlatPage', 'fa-file-text-o'),
-                ('judge.Solution', 'fa-pencil'),
+                ("judge.BlogPost", "fa-rss-square"),
+                ("judge.Comment", "fa-comment-o"),
+                ("judge.Ticket", "fa-exclamation-circle"),
+                ("flatpages.FlatPage", "fa-file-text-o"),
+                ("judge.Solution", "fa-pencil"),
             ],
-            'dashboard': {
-                'breadcrumbs': True,
+            "dashboard": {
+                "breadcrumbs": True,
             },
         },
     }
 
 INSTALLED_APPS += (
-    'django.contrib.admin',
-    'judge',
-    'django.contrib.auth',
-    'django.contrib.contenttypes',
-    'django.contrib.flatpages',
-    'django.contrib.sessions',
-    'django.contrib.messages',
-    'django.contrib.redirects',
-    'django.contrib.staticfiles',
-    'django.contrib.sites',
-    'django.contrib.sitemaps',
-    'registration',
-    'mptt',
-    'reversion',
-    'reversion_compare',
-    'django_social_share',
-    'social_django',
-    'compressor',
-    'django_ace',
-    'pagedown',
-    'sortedm2m',
-    'statici18n',
-    'impersonate',
-    'django_jinja',
-    'chat_box',
-    'newsletter',
-    'django.forms',
+    "django.contrib.admin",
+    "judge",
+    "django.contrib.auth",
+    "django.contrib.contenttypes",
+    "django.contrib.flatpages",
+    "django.contrib.sessions",
+    "django.contrib.messages",
+    "django.contrib.redirects",
+    "django.contrib.staticfiles",
+    "django.contrib.sites",
+    "django.contrib.sitemaps",
+    "registration",
+    "mptt",
+    "reversion",
+    "reversion_compare",
+    "django_social_share",
+    "social_django",
+    "compressor",
+    "django_ace",
+    "pagedown",
+    "sortedm2m",
+    "statici18n",
+    "impersonate",
+    "django_jinja",
+    "chat_box",
+    "newsletter",
+    "django.forms",
 )
 
 MIDDLEWARE = (
-    'judge.middleware.ShortCircuitMiddleware',
-    'django.middleware.common.CommonMiddleware',
-    'django.contrib.sessions.middleware.SessionMiddleware',
-    'django.middleware.locale.LocaleMiddleware',
-    'django.middleware.csrf.CsrfViewMiddleware',
-    'django.contrib.auth.middleware.AuthenticationMiddleware',
-    'judge.middleware.DMOJLoginMiddleware',
-    'django.contrib.messages.middleware.MessageMiddleware',
-    'django.middleware.clickjacking.XFrameOptionsMiddleware',
-    'judge.user_log.LogUserAccessMiddleware',
-    'judge.timezone.TimezoneMiddleware',
-    'impersonate.middleware.ImpersonateMiddleware',
-    'judge.middleware.DMOJImpersonationMiddleware',
-    'judge.middleware.ContestMiddleware',
-    'django.contrib.flatpages.middleware.FlatpageFallbackMiddleware',
-    'judge.social_auth.SocialAuthExceptionMiddleware',
-    'django.contrib.redirects.middleware.RedirectFallbackMiddleware',
+    "judge.middleware.ShortCircuitMiddleware",
+    "django.middleware.common.CommonMiddleware",
+    "django.contrib.sessions.middleware.SessionMiddleware",
+    "django.middleware.locale.LocaleMiddleware",
+    "django.middleware.csrf.CsrfViewMiddleware",
+    "django.contrib.auth.middleware.AuthenticationMiddleware",
+    "judge.middleware.DMOJLoginMiddleware",
+    "django.contrib.messages.middleware.MessageMiddleware",
+    "django.middleware.clickjacking.XFrameOptionsMiddleware",
+    "judge.user_log.LogUserAccessMiddleware",
+    "judge.timezone.TimezoneMiddleware",
+    "impersonate.middleware.ImpersonateMiddleware",
+    "judge.middleware.DMOJImpersonationMiddleware",
+    "judge.middleware.ContestMiddleware",
+    "django.contrib.flatpages.middleware.FlatpageFallbackMiddleware",
+    "judge.social_auth.SocialAuthExceptionMiddleware",
+    "django.contrib.redirects.middleware.RedirectFallbackMiddleware",
 )
 
-FORM_RENDERER = 'django.forms.renderers.TemplatesSetting'
+FORM_RENDERER = "django.forms.renderers.TemplatesSetting"
 
 IMPERSONATE_REQUIRE_SUPERUSER = True
 IMPERSONATE_DISABLE_LOGGING = True
@@ -278,226 +282,229 @@ ACCOUNT_ACTIVATION_DAYS = 7
 
 AUTH_PASSWORD_VALIDATORS = [
     {
-        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
+        "NAME": "django.contrib.auth.password_validation.UserAttributeSimilarityValidator",
     },
     {
-        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
+        "NAME": "django.contrib.auth.password_validation.MinimumLengthValidator",
     },
     {
-        'NAME': 'judge.utils.pwned.PwnedPasswordsValidator',
+        "NAME": "judge.utils.pwned.PwnedPasswordsValidator",
     },
     {
-        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
+        "NAME": "django.contrib.auth.password_validation.NumericPasswordValidator",
     },
 ]
 
-SILENCED_SYSTEM_CHECKS = ['urls.W002', 'fields.W342']
+SILENCED_SYSTEM_CHECKS = ["urls.W002", "fields.W342"]
 
-ROOT_URLCONF = 'dmoj.urls'
-LOGIN_REDIRECT_URL = '/user'
-WSGI_APPLICATION = 'dmoj.wsgi.application'
+ROOT_URLCONF = "dmoj.urls"
+LOGIN_REDIRECT_URL = "/user"
+WSGI_APPLICATION = "dmoj.wsgi.application"
 
 TEMPLATES = [
     {
-        'BACKEND': 'django_jinja.backend.Jinja2',
-        'DIRS': [
-            os.path.join(BASE_DIR, 'templates'),
+        "BACKEND": "django_jinja.backend.Jinja2",
+        "DIRS": [
+            os.path.join(BASE_DIR, "templates"),
         ],
-        'APP_DIRS': False,
-        'OPTIONS': {
-            'match_extension': ('.html', '.txt'),
-            'match_regex': '^(?!admin/)',
-            'context_processors': [
-                'django.template.context_processors.media',
-                'django.template.context_processors.tz',
-                'django.template.context_processors.i18n',
-                'django.template.context_processors.request',
-                'django.contrib.messages.context_processors.messages',
-                'judge.template_context.comet_location',
-                'judge.template_context.get_resource',
-                'judge.template_context.general_info',
-                'judge.template_context.site',
-                'judge.template_context.site_name',
-                'judge.template_context.misc_config',
-                'judge.template_context.math_setting',
-                'social_django.context_processors.backends',
-                'social_django.context_processors.login_redirect',
+        "APP_DIRS": False,
+        "OPTIONS": {
+            "match_extension": (".html", ".txt"),
+            "match_regex": "^(?!admin/)",
+            "context_processors": [
+                "django.template.context_processors.media",
+                "django.template.context_processors.tz",
+                "django.template.context_processors.i18n",
+                "django.template.context_processors.request",
+                "django.contrib.messages.context_processors.messages",
+                "judge.template_context.comet_location",
+                "judge.template_context.get_resource",
+                "judge.template_context.general_info",
+                "judge.template_context.site",
+                "judge.template_context.site_name",
+                "judge.template_context.misc_config",
+                "judge.template_context.math_setting",
+                "social_django.context_processors.backends",
+                "social_django.context_processors.login_redirect",
             ],
-            'autoescape': select_autoescape(['html', 'xml']),
-            'trim_blocks': True,
-            'lstrip_blocks': True,
-            'extensions': DEFAULT_EXTENSIONS + [
-                'compressor.contrib.jinja2ext.CompressorExtension',
-                'judge.jinja2.DMOJExtension',
-                'judge.jinja2.spaceless.SpacelessExtension',
+            "autoescape": select_autoescape(["html", "xml"]),
+            "trim_blocks": True,
+            "lstrip_blocks": True,
+            "extensions": DEFAULT_EXTENSIONS
+            + [
+                "compressor.contrib.jinja2ext.CompressorExtension",
+                "judge.jinja2.DMOJExtension",
+                "judge.jinja2.spaceless.SpacelessExtension",
             ],
         },
     },
     {
-        'BACKEND': 'django.template.backends.django.DjangoTemplates',
-        'APP_DIRS': True,
-        'DIRS': [
-            os.path.join(BASE_DIR, 'templates'),
+        "BACKEND": "django.template.backends.django.DjangoTemplates",
+        "APP_DIRS": True,
+        "DIRS": [
+            os.path.join(BASE_DIR, "templates"),
         ],
-        'OPTIONS': {
-            'context_processors': [
-                'django.contrib.auth.context_processors.auth',
-                'django.template.context_processors.media',
-                'django.template.context_processors.tz',
-                'django.template.context_processors.i18n',
-                'django.template.context_processors.request',
-                'django.contrib.messages.context_processors.messages',
+        "OPTIONS": {
+            "context_processors": [
+                "django.contrib.auth.context_processors.auth",
+                "django.template.context_processors.media",
+                "django.template.context_processors.tz",
+                "django.template.context_processors.i18n",
+                "django.template.context_processors.request",
+                "django.contrib.messages.context_processors.messages",
             ],
         },
     },
 ]
 
 LOCALE_PATHS = [
-    os.path.join(BASE_DIR, 'locale'),
+    os.path.join(BASE_DIR, "locale"),
 ]
 
 LANGUAGES = [
-    ('de', _('German')),
-    ('en', _('English')),
-    ('es', _('Spanish')),
-    ('fr', _('French')),
-    ('hr', _('Croatian')),
-    ('hu', _('Hungarian')),
-    ('ja', _('Japanese')),
-    ('ko', _('Korean')),
-    ('pt', _('Brazilian Portuguese')),
-    ('ro', _('Romanian')),
-    ('ru', _('Russian')),
-    ('sr-latn', _('Serbian (Latin)')),
-    ('tr', _('Turkish')),
-    ('vi', _('Vietnamese')),
-    ('zh-hans', _('Simplified Chinese')),
-    ('zh-hant', _('Traditional Chinese')),
+    ("de", _("German")),
+    ("en", _("English")),
+    ("es", _("Spanish")),
+    ("fr", _("French")),
+    ("hr", _("Croatian")),
+    ("hu", _("Hungarian")),
+    ("ja", _("Japanese")),
+    ("ko", _("Korean")),
+    ("pt", _("Brazilian Portuguese")),
+    ("ro", _("Romanian")),
+    ("ru", _("Russian")),
+    ("sr-latn", _("Serbian (Latin)")),
+    ("tr", _("Turkish")),
+    ("vi", _("Vietnamese")),
+    ("zh-hans", _("Simplified Chinese")),
+    ("zh-hant", _("Traditional Chinese")),
 ]
 
 MARKDOWN_ADMIN_EDITABLE_STYLE = {
-    'safe_mode': False,
-    'use_camo': True,
-    'texoid': True,
-    'math': True,
+    "safe_mode": False,
+    "use_camo": True,
+    "texoid": True,
+    "math": True,
 }
 
 MARKDOWN_DEFAULT_STYLE = {
-    'safe_mode': True,
-    'nofollow': True,
-    'use_camo': True,
-    'math': True,
+    "safe_mode": True,
+    "nofollow": True,
+    "use_camo": True,
+    "math": True,
 }
 
 MARKDOWN_USER_LARGE_STYLE = {
-    'safe_mode': True,
-    'nofollow': True,
-    'use_camo': True,
-    'math': True,
+    "safe_mode": True,
+    "nofollow": True,
+    "use_camo": True,
+    "math": True,
 }
 
 MARKDOWN_STYLES = {
-    'comment': MARKDOWN_DEFAULT_STYLE,
-    'self-description': MARKDOWN_USER_LARGE_STYLE,
-    'problem': MARKDOWN_ADMIN_EDITABLE_STYLE,
-    'contest': MARKDOWN_ADMIN_EDITABLE_STYLE,
-    'language': MARKDOWN_ADMIN_EDITABLE_STYLE,
-    'license': MARKDOWN_ADMIN_EDITABLE_STYLE,
-    'judge': MARKDOWN_ADMIN_EDITABLE_STYLE,
-    'blog': MARKDOWN_ADMIN_EDITABLE_STYLE,
-    'solution': MARKDOWN_ADMIN_EDITABLE_STYLE,
-    'contest_tag': MARKDOWN_ADMIN_EDITABLE_STYLE,
-    'organization-about': MARKDOWN_USER_LARGE_STYLE,
-    'ticket': MARKDOWN_USER_LARGE_STYLE,
+    "comment": MARKDOWN_DEFAULT_STYLE,
+    "self-description": MARKDOWN_USER_LARGE_STYLE,
+    "problem": MARKDOWN_ADMIN_EDITABLE_STYLE,
+    "contest": MARKDOWN_ADMIN_EDITABLE_STYLE,
+    "language": MARKDOWN_ADMIN_EDITABLE_STYLE,
+    "license": MARKDOWN_ADMIN_EDITABLE_STYLE,
+    "judge": MARKDOWN_ADMIN_EDITABLE_STYLE,
+    "blog": MARKDOWN_ADMIN_EDITABLE_STYLE,
+    "solution": MARKDOWN_ADMIN_EDITABLE_STYLE,
+    "contest_tag": MARKDOWN_ADMIN_EDITABLE_STYLE,
+    "organization-about": MARKDOWN_USER_LARGE_STYLE,
+    "ticket": MARKDOWN_USER_LARGE_STYLE,
 }
 
 # Database
 # https://docs.djangoproject.com/en/1.11/ref/settings/#databases
 
 DATABASES = {
-    'default': {
-        'ENGINE': 'django.db.backends.sqlite3',
-        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
+    "default": {
+        "ENGINE": "django.db.backends.sqlite3",
+        "NAME": os.path.join(BASE_DIR, "db.sqlite3"),
     },
 }
 
 ENABLE_FTS = False
 
 # Bridged configuration
-BRIDGED_JUDGE_ADDRESS = [('localhost', 9999)]
+BRIDGED_JUDGE_ADDRESS = [("localhost", 9999)]
 BRIDGED_JUDGE_PROXIES = None
-BRIDGED_DJANGO_ADDRESS = [('localhost', 9998)]
+BRIDGED_DJANGO_ADDRESS = [("localhost", 9998)]
 BRIDGED_DJANGO_CONNECT = None
 
 # Event Server configuration
 EVENT_DAEMON_USE = False
-EVENT_DAEMON_POST = 'ws://localhost:9997/'
-EVENT_DAEMON_GET = 'ws://localhost:9996/'
-EVENT_DAEMON_POLL = '/channels/'
+EVENT_DAEMON_POST = "ws://localhost:9997/"
+EVENT_DAEMON_GET = "ws://localhost:9996/"
+EVENT_DAEMON_POLL = "/channels/"
 EVENT_DAEMON_KEY = None
-EVENT_DAEMON_AMQP_EXCHANGE = 'dmoj-events'
-EVENT_DAEMON_SUBMISSION_KEY = '6Sdmkx^%pk@GsifDfXcwX*Y7LRF%RGT8vmFpSxFBT$fwS7trc8raWfN#CSfQuKApx&$B#Gh2L7p%W!Ww'
+EVENT_DAEMON_AMQP_EXCHANGE = "dmoj-events"
+EVENT_DAEMON_SUBMISSION_KEY = (
+    "6Sdmkx^%pk@GsifDfXcwX*Y7LRF%RGT8vmFpSxFBT$fwS7trc8raWfN#CSfQuKApx&$B#Gh2L7p%W!Ww"
+)
 
 # Internationalization
 # https://docs.djangoproject.com/en/1.11/topics/i18n/
 
 # Whatever you do, this better be one of the entries in `LANGUAGES`.
-LANGUAGE_CODE = 'vi'
-TIME_ZONE = 'Asia/Ho_Chi_Minh'
-DEFAULT_USER_TIME_ZONE = 'Asia/Ho_Chi_Minh'
+LANGUAGE_CODE = "vi"
+TIME_ZONE = "Asia/Ho_Chi_Minh"
+DEFAULT_USER_TIME_ZONE = "Asia/Ho_Chi_Minh"
 USE_I18N = True
 USE_L10N = True
 USE_TZ = True
 
 # Cookies
-SESSION_ENGINE = 'django.contrib.sessions.backends.cached_db'
+SESSION_ENGINE = "django.contrib.sessions.backends.cached_db"
 
 # Static files (CSS, JavaScript, Images)
 # https://docs.djangoproject.com/en/1.11/howto/static-files/
 
-DMOJ_RESOURCES = os.path.join(BASE_DIR, 'resources')
+DMOJ_RESOURCES = os.path.join(BASE_DIR, "resources")
 STATICFILES_FINDERS = (
-    'django.contrib.staticfiles.finders.FileSystemFinder',
-    'django.contrib.staticfiles.finders.AppDirectoriesFinder',
+    "django.contrib.staticfiles.finders.FileSystemFinder",
+    "django.contrib.staticfiles.finders.AppDirectoriesFinder",
 )
 STATICFILES_DIRS = [
-    os.path.join(BASE_DIR, 'resources'),
+    os.path.join(BASE_DIR, "resources"),
 ]
-STATIC_URL = '/static/'
+STATIC_URL = "/static/"
 
 # Define a cache
 CACHES = {}
 
 # Authentication
 AUTHENTICATION_BACKENDS = (
-    'social_core.backends.google.GoogleOAuth2',
-    'social_core.backends.facebook.FacebookOAuth2',
-    'judge.social_auth.GitHubSecureEmailOAuth2',
-    'django.contrib.auth.backends.ModelBackend',
+    "social_core.backends.google.GoogleOAuth2",
+    "social_core.backends.facebook.FacebookOAuth2",
+    "judge.social_auth.GitHubSecureEmailOAuth2",
+    "django.contrib.auth.backends.ModelBackend",
 )
 
 SOCIAL_AUTH_PIPELINE = (
-    'social_core.pipeline.social_auth.social_details',
-    'social_core.pipeline.social_auth.social_uid',
-    'social_core.pipeline.social_auth.auth_allowed',
-    'judge.social_auth.verify_email',
-    'social_core.pipeline.social_auth.social_user',
-    'social_core.pipeline.user.get_username',
-    'social_core.pipeline.social_auth.associate_by_email',
-    'judge.social_auth.choose_username',
-    'social_core.pipeline.user.create_user',
-    'judge.social_auth.make_profile',
-    'social_core.pipeline.social_auth.associate_user',
-    'social_core.pipeline.social_auth.load_extra_data',
-    'social_core.pipeline.user.user_details',
+    "social_core.pipeline.social_auth.social_details",
+    "social_core.pipeline.social_auth.social_uid",
+    "social_core.pipeline.social_auth.auth_allowed",
+    "judge.social_auth.verify_email",
+    "social_core.pipeline.social_auth.social_user",
+    "social_core.pipeline.user.get_username",
+    "social_core.pipeline.social_auth.associate_by_email",
+    "judge.social_auth.choose_username",
+    "social_core.pipeline.user.create_user",
+    "judge.social_auth.make_profile",
+    "social_core.pipeline.social_auth.associate_user",
+    "social_core.pipeline.social_auth.load_extra_data",
+    "social_core.pipeline.user.user_details",
 )
 
-SOCIAL_AUTH_PROTECTED_USER_FIELDS = ['first_name', 'last_name']
-SOCIAL_AUTH_GOOGLE_OAUTH2_USER_FIELDS = ['email', 'username']
-SOCIAL_AUTH_GITHUB_SECURE_SCOPE = ['user:email']
-SOCIAL_AUTH_FACEBOOK_SCOPE = ['email']
+SOCIAL_AUTH_PROTECTED_USER_FIELDS = ["first_name", "last_name"]
+SOCIAL_AUTH_GOOGLE_OAUTH2_USER_FIELDS = ["email", "username"]
+SOCIAL_AUTH_GITHUB_SECURE_SCOPE = ["user:email"]
+SOCIAL_AUTH_FACEBOOK_SCOPE = ["email"]
 SOCIAL_AUTH_SLUGIFY_USERNAMES = True
-SOCIAL_AUTH_SLUGIFY_FUNCTION = 'judge.social_auth.slugify_username'
+SOCIAL_AUTH_SLUGIFY_FUNCTION = "judge.social_auth.slugify_username"
 
 JUDGE_AMQP_PATH = None
 
@@ -529,7 +536,7 @@ NEWSLETTER_BATCH_SIZE = 100
 REGISTER_NAME_URL = None
 
 try:
-    with open(os.path.join(os.path.dirname(__file__), 'local_settings.py')) as f:
+    with open(os.path.join(os.path.dirname(__file__), "local_settings.py")) as f:
         exec(f.read(), globals())
 except IOError:
     pass

dmoj/throttle_mail.py

@@ -8,8 +8,8 @@ DEFAULT_THROTTLE = (10, 60)
 
 
 def new_email():
-    cache.add('error_email_throttle', 0, settings.DMOJ_EMAIL_THROTTLING[1])
-    return cache.incr('error_email_throttle')
+    cache.add("error_email_throttle", 0, settings.DMOJ_EMAIL_THROTTLING[1])
+    return cache.incr("error_email_throttle")
 
 
 class ThrottledEmailHandler(AdminEmailHandler):

dmoj/wsgi.py

@@ -1,5 +1,6 @@
 import os
-os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'dmoj.settings')
+
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "dmoj.settings")
 
 try:
     import MySQLdb  # noqa: F401, imported for side effect
@@ -8,5 +9,8 @@ except ImportError:
 
     pymysql.install_as_MySQLdb()
 
-from django.core.wsgi import get_wsgi_application  # noqa: E402, django must be imported here
+from django.core.wsgi import (
+    get_wsgi_application,
+)  # noqa: E402, django must be imported here
+
 application = get_wsgi_application()

dmoj/wsgi_async.py

@@ -2,13 +2,17 @@ import os
 
 import gevent.monkey  # noqa: I100, gevent must be imported here
 
-os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'dmoj.settings')
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "dmoj.settings")
 gevent.monkey.patch_all()
 
 # noinspection PyUnresolvedReferences
 import dmoj_install_pymysql  # noqa: F401, I100, I202, imported for side effect
 
-from django.core.wsgi import get_wsgi_application  # noqa: E402, I100, I202, django must be imported here
+from django.core.wsgi import (
+    get_wsgi_application,
+)  # noqa: E402, I100, I202, django must be imported here
+
 # noinspection PyUnresolvedReferences
 import django_2_2_pymysql_patch  # noqa: I100, F401, I202, imported for side effect
+
 application = get_wsgi_application()

dmoj_bridge_async.py

@@ -2,19 +2,22 @@ import os
 
 import gevent.monkey  # noqa: I100, gevent must be imported here
 
-os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'dmoj.settings')
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "dmoj.settings")
 gevent.monkey.patch_all()
 
 # noinspection PyUnresolvedReferences
 import dmoj_install_pymysql  # noqa: E402, F401, I100, I202, imported for side effect
 
 import django  # noqa: E402, F401, I100, I202, django must be imported here
+
 django.setup()
 
 # noinspection PyUnresolvedReferences
 import django_2_2_pymysql_patch  # noqa: E402, I100, F401, I202, imported for side effect
 
-from judge.bridge.daemon import judge_daemon  # noqa: E402, I100, I202, django code must be imported here
+from judge.bridge.daemon import (
+    judge_daemon,
+)  # noqa: E402, I100, I202, django code must be imported here
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     judge_daemon()

dmoj_celery.py

@@ -6,7 +6,7 @@ except ImportError:
     import dmoj_install_pymysql  # noqa: F401, imported for side effect
 
 # set the default Django settings module for the 'celery' program.
-os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'dmoj.settings')
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "dmoj.settings")
 
 # noinspection PyUnresolvedReferences
 import django_2_2_pymysql_patch  # noqa: I100, F401, I202, imported for side effect

judge/__init__.py

@@ -1 +1 @@
-default_app_config = 'judge.apps.JudgeAppConfig'
+default_app_config = "judge.apps.JudgeAppConfig"

judge/admin/__init__.py

@@ -3,7 +3,12 @@ from django.contrib.admin.models import LogEntry
 
 from judge.admin.comments import CommentAdmin
 from judge.admin.contest import ContestAdmin, ContestParticipationAdmin, ContestTagAdmin
-from judge.admin.interface import BlogPostAdmin, LicenseAdmin, LogEntryAdmin, NavigationBarAdmin
+from judge.admin.interface import (
+    BlogPostAdmin,
+    LicenseAdmin,
+    LogEntryAdmin,
+    NavigationBarAdmin,
+)
 from judge.admin.organization import OrganizationAdmin, OrganizationRequestAdmin
 from judge.admin.problem import ProblemAdmin, ProblemPointsVoteAdmin
 from judge.admin.profile import ProfileAdmin
@@ -12,10 +17,29 @@ from judge.admin.submission import SubmissionAdmin
 from judge.admin.taxon import ProblemGroupAdmin, ProblemTypeAdmin
 from judge.admin.ticket import TicketAdmin
 from judge.admin.volunteer import VolunteerProblemVoteAdmin
-from judge.models import BlogPost, Comment, CommentLock, Contest, ContestParticipation, \
-    ContestTag, Judge, Language, License, MiscConfig, NavigationBar, Organization, \
-    OrganizationRequest, Problem, ProblemGroup, ProblemPointsVote, ProblemType, Profile, Submission, Ticket, \
-    VolunteerProblemVote
+from judge.models import (
+    BlogPost,
+    Comment,
+    CommentLock,
+    Contest,
+    ContestParticipation,
+    ContestTag,
+    Judge,
+    Language,
+    License,
+    MiscConfig,
+    NavigationBar,
+    Organization,
+    OrganizationRequest,
+    Problem,
+    ProblemGroup,
+    ProblemPointsVote,
+    ProblemType,
+    Profile,
+    Submission,
+    Ticket,
+    VolunteerProblemVote,
+)
 
 
 admin.site.register(BlogPost, BlogPostAdmin)

judge/admin/comments.py

@@ -11,53 +11,70 @@ from judge.widgets import AdminHeavySelect2Widget, HeavyPreviewAdminPageDownWidg
 class CommentForm(ModelForm):
     class Meta:
         widgets = {
-            'author': AdminHeavySelect2Widget(data_view='profile_select2'),
-            'parent': AdminHeavySelect2Widget(data_view='comment_select2'),
+            "author": AdminHeavySelect2Widget(data_view="profile_select2"),
+            "parent": AdminHeavySelect2Widget(data_view="comment_select2"),
         }
         if HeavyPreviewAdminPageDownWidget is not None:
-            widgets['body'] = HeavyPreviewAdminPageDownWidget(preview=reverse_lazy('comment_preview'))
+            widgets["body"] = HeavyPreviewAdminPageDownWidget(
+                preview=reverse_lazy("comment_preview")
+            )
 
 
 class CommentAdmin(VersionAdmin):
     fieldsets = (
-        (None, {'fields': ('author', 'page', 'parent', 'score', 'hidden')}),
-        ('Content', {'fields': ('body',)}),
+        (None, {"fields": ("author", "page", "parent", "score", "hidden")}),
+        ("Content", {"fields": ("body",)}),
     )
-    list_display = ['author', 'linked_page', 'time']
-    search_fields = ['author__user__username', 'page', 'body']
-    readonly_fields = ['score']
-    actions = ['hide_comment', 'unhide_comment']
-    list_filter = ['hidden']
+    list_display = ["author", "linked_page", "time"]
+    search_fields = ["author__user__username", "page", "body"]
+    readonly_fields = ["score"]
+    actions = ["hide_comment", "unhide_comment"]
+    list_filter = ["hidden"]
     actions_on_top = True
     actions_on_bottom = True
     form = CommentForm
-    date_hierarchy = 'time'
+    date_hierarchy = "time"
 
     def get_queryset(self, request):
-        return Comment.objects.order_by('-time')
+        return Comment.objects.order_by("-time")
 
     def hide_comment(self, request, queryset):
         count = queryset.update(hidden=True)
-        self.message_user(request, ungettext('%d comment successfully hidden.',
-                                             '%d comments successfully hidden.',
-                                             count) % count)
-    hide_comment.short_description = _('Hide comments')
+        self.message_user(
+            request,
+            ungettext(
+                "%d comment successfully hidden.",
+                "%d comments successfully hidden.",
+                count,
+            )
+            % count,
+        )
+
+    hide_comment.short_description = _("Hide comments")
 
     def unhide_comment(self, request, queryset):
         count = queryset.update(hidden=False)
-        self.message_user(request, ungettext('%d comment successfully unhidden.',
-                                             '%d comments successfully unhidden.',
-                                             count) % count)
-    unhide_comment.short_description = _('Unhide comments')
+        self.message_user(
+            request,
+            ungettext(
+                "%d comment successfully unhidden.",
+                "%d comments successfully unhidden.",
+                count,
+            )
+            % count,
+        )
+
+    unhide_comment.short_description = _("Unhide comments")
 
     def linked_page(self, obj):
         link = obj.link
         if link is not None:
             return format_html('<a href="{0}">{1}</a>', link, obj.page)
         else:
-            return format_html('{0}', obj.page)
-    linked_page.short_description = _('Associated page')
-    linked_page.admin_order_field = 'page'
+            return format_html("{0}", obj.page)
+
+    linked_page.short_description = _("Associated page")
+    linked_page.admin_order_field = "page"
 
     def save_model(self, request, obj, form, change):
         super(CommentAdmin, self).save_model(request, obj, form, change)

judge/admin/contest.py

@@ -16,8 +16,14 @@ from reversion_compare.admin import CompareVersionAdmin
 from django_ace import AceWidget
 from judge.models import Contest, ContestProblem, ContestSubmission, Profile, Rating
 from judge.ratings import rate_contest
-from judge.widgets import AdminHeavySelect2MultipleWidget, AdminHeavySelect2Widget, AdminPagedownWidget, \
-    AdminSelect2MultipleWidget, AdminSelect2Widget, HeavyPreviewAdminPageDownWidget
+from judge.widgets import (
+    AdminHeavySelect2MultipleWidget,
+    AdminHeavySelect2Widget,
+    AdminPagedownWidget,
+    AdminSelect2MultipleWidget,
+    AdminSelect2Widget,
+    HeavyPreviewAdminPageDownWidget,
+)
 
 
 class AdminHeavySelect2Widget(AdminHeavySelect2Widget):
@@ -28,159 +34,252 @@ class AdminHeavySelect2Widget(AdminHeavySelect2Widget):
 
 class ContestTagForm(ModelForm):
     contests = ModelMultipleChoiceField(
-        label=_('Included contests'),
+        label=_("Included contests"),
         queryset=Contest.objects.all(),
         required=False,
-        widget=AdminHeavySelect2MultipleWidget(data_view='contest_select2'))
+        widget=AdminHeavySelect2MultipleWidget(data_view="contest_select2"),
+    )
 
 
 class ContestTagAdmin(admin.ModelAdmin):
-    fields = ('name', 'color', 'description', 'contests')
-    list_display = ('name', 'color')
+    fields = ("name", "color", "description", "contests")
+    list_display = ("name", "color")
     actions_on_top = True
     actions_on_bottom = True
     form = ContestTagForm
 
     if AdminPagedownWidget is not None:
         formfield_overrides = {
-            TextField: {'widget': AdminPagedownWidget},
+            TextField: {"widget": AdminPagedownWidget},
         }
 
     def save_model(self, request, obj, form, change):
         super(ContestTagAdmin, self).save_model(request, obj, form, change)
-        obj.contests.set(form.cleaned_data['contests'])
+        obj.contests.set(form.cleaned_data["contests"])
 
     def get_form(self, request, obj=None, **kwargs):
         form = super(ContestTagAdmin, self).get_form(request, obj, **kwargs)
         if obj is not None:
-            form.base_fields['contests'].initial = obj.contests.all()
+            form.base_fields["contests"].initial = obj.contests.all()
         return form
 
 
 class ContestProblemInlineForm(ModelForm):
     class Meta:
-        widgets = {'problem': AdminHeavySelect2Widget(data_view='problem_select2')}
+        widgets = {"problem": AdminHeavySelect2Widget(data_view="problem_select2")}
 
 
 class ContestProblemInline(admin.TabularInline):
     model = ContestProblem
-    verbose_name = _('Problem')
-    verbose_name_plural = 'Problems'
-    fields = ('problem', 'points', 'partial', 'is_pretested', 'max_submissions', 'output_prefix_override', 'order',
-              'rejudge_column')
-    readonly_fields = ('rejudge_column',)
+    verbose_name = _("Problem")
+    verbose_name_plural = "Problems"
+    fields = (
+        "problem",
+        "points",
+        "partial",
+        "is_pretested",
+        "max_submissions",
+        "output_prefix_override",
+        "order",
+        "rejudge_column",
+    )
+    readonly_fields = ("rejudge_column",)
     form = ContestProblemInlineForm
 
     def rejudge_column(self, obj):
         if obj.id is None:
-            return ''
-        return format_html('<a class="button rejudge-link" href="{}">Rejudge</a>',
-                           reverse('admin:judge_contest_rejudge', args=(obj.contest.id, obj.id)))
-    rejudge_column.short_description = ''
+            return ""
+        return format_html(
+            '<a class="button rejudge-link" href="{}">Rejudge</a>',
+            reverse("admin:judge_contest_rejudge", args=(obj.contest.id, obj.id)),
+        )
+
+    rejudge_column.short_description = ""
 
 
 class ContestForm(ModelForm):
     def __init__(self, *args, **kwargs):
         super(ContestForm, self).__init__(*args, **kwargs)
-        if 'rate_exclude' in self.fields:
+        if "rate_exclude" in self.fields:
             if self.instance and self.instance.id:
-                self.fields['rate_exclude'].queryset = \
-                    Profile.objects.filter(contest_history__contest=self.instance).distinct()
+                self.fields["rate_exclude"].queryset = Profile.objects.filter(
+                    contest_history__contest=self.instance
+                ).distinct()
             else:
-                self.fields['rate_exclude'].queryset = Profile.objects.none()
-        self.fields['banned_users'].widget.can_add_related = False
-        self.fields['view_contest_scoreboard'].widget.can_add_related = False
+                self.fields["rate_exclude"].queryset = Profile.objects.none()
+        self.fields["banned_users"].widget.can_add_related = False
+        self.fields["view_contest_scoreboard"].widget.can_add_related = False
 
     def clean(self):
         cleaned_data = super(ContestForm, self).clean()
-        cleaned_data['banned_users'].filter(current_contest__contest=self.instance).update(current_contest=None)
+        cleaned_data["banned_users"].filter(
+            current_contest__contest=self.instance
+        ).update(current_contest=None)
 
     class Meta:
         widgets = {
-            'authors': AdminHeavySelect2MultipleWidget(data_view='profile_select2'),
-            'curators': AdminHeavySelect2MultipleWidget(data_view='profile_select2'),
-            'testers': AdminHeavySelect2MultipleWidget(data_view='profile_select2'),
-            'private_contestants': AdminHeavySelect2MultipleWidget(data_view='profile_select2',
-                                                                   attrs={'style': 'width: 100%'}),
-            'organizations': AdminHeavySelect2MultipleWidget(data_view='organization_select2'),
-            'tags': AdminSelect2MultipleWidget,
-            'banned_users': AdminHeavySelect2MultipleWidget(data_view='profile_select2',
-                                                            attrs={'style': 'width: 100%'}),
-            'view_contest_scoreboard': AdminHeavySelect2MultipleWidget(data_view='profile_select2',
-                                                                       attrs={'style': 'width: 100%'}),
+            "authors": AdminHeavySelect2MultipleWidget(data_view="profile_select2"),
+            "curators": AdminHeavySelect2MultipleWidget(data_view="profile_select2"),
+            "testers": AdminHeavySelect2MultipleWidget(data_view="profile_select2"),
+            "private_contestants": AdminHeavySelect2MultipleWidget(
+                data_view="profile_select2", attrs={"style": "width: 100%"}
+            ),
+            "organizations": AdminHeavySelect2MultipleWidget(
+                data_view="organization_select2"
+            ),
+            "tags": AdminSelect2MultipleWidget,
+            "banned_users": AdminHeavySelect2MultipleWidget(
+                data_view="profile_select2", attrs={"style": "width: 100%"}
+            ),
+            "view_contest_scoreboard": AdminHeavySelect2MultipleWidget(
+                data_view="profile_select2", attrs={"style": "width: 100%"}
+            ),
         }
 
         if HeavyPreviewAdminPageDownWidget is not None:
-            widgets['description'] = HeavyPreviewAdminPageDownWidget(preview=reverse_lazy('contest_preview'))
+            widgets["description"] = HeavyPreviewAdminPageDownWidget(
+                preview=reverse_lazy("contest_preview")
+            )
 
 
 class ContestAdmin(CompareVersionAdmin):
     fieldsets = (
-        (None, {'fields': ('key', 'name', 'authors', 'curators', 'testers')}),
-        (_('Settings'), {'fields': ('is_visible', 'use_clarifications', 'hide_problem_tags', 'scoreboard_visibility',
-                                    'run_pretests_only', 'points_precision')}),
-        (_('Scheduling'), {'fields': ('start_time', 'end_time', 'time_limit')}),
-        (_('Details'), {'fields': ('description', 'og_image', 'logo_override_image', 'tags', 'summary')}),
-        (_('Format'), {'fields': ('format_name', 'format_config', 'problem_label_script')}),
-        (_('Rating'), {'fields': ('is_rated', 'rate_all', 'rating_floor', 'rating_ceiling', 'rate_exclude')}),
-        (_('Access'), {'fields': ('access_code', 'is_private', 'private_contestants', 'is_organization_private',
-                                  'organizations', 'view_contest_scoreboard')}),
-        (_('Justice'), {'fields': ('banned_users',)}),
+        (None, {"fields": ("key", "name", "authors", "curators", "testers")}),
+        (
+            _("Settings"),
+            {
+                "fields": (
+                    "is_visible",
+                    "use_clarifications",
+                    "hide_problem_tags",
+                    "scoreboard_visibility",
+                    "run_pretests_only",
+                    "points_precision",
                 )
-    list_display = ('key', 'name', 'is_visible', 'is_rated', 'start_time', 'end_time', 'time_limit', 'user_count')
-    search_fields = ('key', 'name')
+            },
+        ),
+        (_("Scheduling"), {"fields": ("start_time", "end_time", "time_limit")}),
+        (
+            _("Details"),
+            {
+                "fields": (
+                    "description",
+                    "og_image",
+                    "logo_override_image",
+                    "tags",
+                    "summary",
+                )
+            },
+        ),
+        (
+            _("Format"),
+            {"fields": ("format_name", "format_config", "problem_label_script")},
+        ),
+        (
+            _("Rating"),
+            {
+                "fields": (
+                    "is_rated",
+                    "rate_all",
+                    "rating_floor",
+                    "rating_ceiling",
+                    "rate_exclude",
+                )
+            },
+        ),
+        (
+            _("Access"),
+            {
+                "fields": (
+                    "access_code",
+                    "is_private",
+                    "private_contestants",
+                    "is_organization_private",
+                    "organizations",
+                    "view_contest_scoreboard",
+                )
+            },
+        ),
+        (_("Justice"), {"fields": ("banned_users",)}),
+    )
+    list_display = (
+        "key",
+        "name",
+        "is_visible",
+        "is_rated",
+        "start_time",
+        "end_time",
+        "time_limit",
+        "user_count",
+    )
+    search_fields = ("key", "name")
     inlines = [ContestProblemInline]
     actions_on_top = True
     actions_on_bottom = True
     form = ContestForm
-    change_list_template = 'admin/judge/contest/change_list.html'
-    filter_horizontal = ['rate_exclude']
-    date_hierarchy = 'start_time'
+    change_list_template = "admin/judge/contest/change_list.html"
+    filter_horizontal = ["rate_exclude"]
+    date_hierarchy = "start_time"
 
     def get_actions(self, request):
         actions = super(ContestAdmin, self).get_actions(request)
 
-        if request.user.has_perm('judge.change_contest_visibility') or \
-                request.user.has_perm('judge.create_private_contest'):
-            for action in ('make_visible', 'make_hidden'):
+        if request.user.has_perm(
+            "judge.change_contest_visibility"
+        ) or request.user.has_perm("judge.create_private_contest"):
+            for action in ("make_visible", "make_hidden"):
                 actions[action] = self.get_action(action)
 
         return actions
 
     def get_queryset(self, request):
         queryset = Contest.objects.all()
-        if request.user.has_perm('judge.edit_all_contest'):
+        if request.user.has_perm("judge.edit_all_contest"):
             return queryset
         else:
-            return queryset.filter(Q(authors=request.profile) | Q(curators=request.profile)).distinct()
+            return queryset.filter(
+                Q(authors=request.profile) | Q(curators=request.profile)
+            ).distinct()
 
     def get_readonly_fields(self, request, obj=None):
         readonly = []
-        if not request.user.has_perm('judge.contest_rating'):
-            readonly += ['is_rated', 'rate_all', 'rate_exclude']
-        if not request.user.has_perm('judge.contest_access_code'):
-            readonly += ['access_code']
-        if not request.user.has_perm('judge.create_private_contest'):
-            readonly += ['is_private', 'private_contestants', 'is_organization_private', 'organizations']
-            if not request.user.has_perm('judge.change_contest_visibility'):
-                readonly += ['is_visible']
-        if not request.user.has_perm('judge.contest_problem_label'):
-            readonly += ['problem_label_script']
+        if not request.user.has_perm("judge.contest_rating"):
+            readonly += ["is_rated", "rate_all", "rate_exclude"]
+        if not request.user.has_perm("judge.contest_access_code"):
+            readonly += ["access_code"]
+        if not request.user.has_perm("judge.create_private_contest"):
+            readonly += [
+                "is_private",
+                "private_contestants",
+                "is_organization_private",
+                "organizations",
+            ]
+            if not request.user.has_perm("judge.change_contest_visibility"):
+                readonly += ["is_visible"]
+        if not request.user.has_perm("judge.contest_problem_label"):
+            readonly += ["problem_label_script"]
         return readonly
 
     def save_model(self, request, obj, form, change):
         # `is_visible` will not appear in `cleaned_data` if user cannot edit it
-        if form.cleaned_data.get('is_visible') and not request.user.has_perm('judge.change_contest_visibility'):
-            if not form.cleaned_data['is_private'] and not form.cleaned_data['is_organization_private']:
+        if form.cleaned_data.get("is_visible") and not request.user.has_perm(
+            "judge.change_contest_visibility"
+        ):
+            if (
+                not form.cleaned_data["is_private"]
+                and not form.cleaned_data["is_organization_private"]
+            ):
                 raise PermissionDenied
-            if not request.user.has_perm('judge.create_private_contest'):
+            if not request.user.has_perm("judge.create_private_contest"):
                 raise PermissionDenied
 
         super().save_model(request, obj, form, change)
 
         # We need this flag because `save_related` deals with the inlines, but does not know if we have already rescored
         self._rescored = False
-        if form.changed_data and any(f in form.changed_data for f in ('format_config', 'format_name')):
+        if form.changed_data and any(
+            f in form.changed_data for f in ("format_config", "format_name")
+        ):
             self._rescore(obj.key)
             self._rescored = True
 
@@ -188,10 +287,10 @@ class ContestAdmin(CompareVersionAdmin):
         super().save_related(request, form, formsets, change)
         # Only rescored if we did not already do so in `save_model`
         if not self._rescored and any(formset.has_changed() for formset in formsets):
-            self._rescore(form.cleaned_data['key'])
+            self._rescore(form.cleaned_data["key"])
 
     def has_change_permission(self, request, obj=None):
-        if not request.user.has_perm('judge.edit_own_contest'):
+        if not request.user.has_perm("judge.edit_own_contest"):
             return False
         if obj is None:
             return True
@@ -199,76 +298,113 @@ class ContestAdmin(CompareVersionAdmin):
 
     def _rescore(self, contest_key):
         from judge.tasks import rescore_contest
+
         transaction.on_commit(rescore_contest.s(contest_key).delay)
 
     def make_visible(self, request, queryset):
-        if not request.user.has_perm('judge.change_contest_visibility'):
-            queryset = queryset.filter(Q(is_private=True) | Q(is_organization_private=True))
+        if not request.user.has_perm("judge.change_contest_visibility"):
+            queryset = queryset.filter(
+                Q(is_private=True) | Q(is_organization_private=True)
+            )
         count = queryset.update(is_visible=True)
-        self.message_user(request, ungettext('%d contest successfully marked as visible.',
-                                             '%d contests successfully marked as visible.',
-                                             count) % count)
-    make_visible.short_description = _('Mark contests as visible')
+        self.message_user(
+            request,
+            ungettext(
+                "%d contest successfully marked as visible.",
+                "%d contests successfully marked as visible.",
+                count,
+            )
+            % count,
+        )
+
+    make_visible.short_description = _("Mark contests as visible")
 
     def make_hidden(self, request, queryset):
-        if not request.user.has_perm('judge.change_contest_visibility'):
-            queryset = queryset.filter(Q(is_private=True) | Q(is_organization_private=True))
+        if not request.user.has_perm("judge.change_contest_visibility"):
+            queryset = queryset.filter(
+                Q(is_private=True) | Q(is_organization_private=True)
+            )
         count = queryset.update(is_visible=True)
-        self.message_user(request, ungettext('%d contest successfully marked as hidden.',
-                                             '%d contests successfully marked as hidden.',
-                                             count) % count)
-    make_hidden.short_description = _('Mark contests as hidden')
+        self.message_user(
+            request,
+            ungettext(
+                "%d contest successfully marked as hidden.",
+                "%d contests successfully marked as hidden.",
+                count,
+            )
+            % count,
+        )
+
+    make_hidden.short_description = _("Mark contests as hidden")
 
     def get_urls(self):
         return [
-            url(r'^rate/all/$', self.rate_all_view, name='judge_contest_rate_all'),
-            url(r'^(\d+)/rate/$', self.rate_view, name='judge_contest_rate'),
-            url(r'^(\d+)/judge/(\d+)/$', self.rejudge_view, name='judge_contest_rejudge'),
+            url(r"^rate/all/$", self.rate_all_view, name="judge_contest_rate_all"),
+            url(r"^(\d+)/rate/$", self.rate_view, name="judge_contest_rate"),
+            url(
+                r"^(\d+)/judge/(\d+)/$", self.rejudge_view, name="judge_contest_rejudge"
+            ),
         ] + super(ContestAdmin, self).get_urls()
 
     def rejudge_view(self, request, contest_id, problem_id):
-        queryset = ContestSubmission.objects.filter(problem_id=problem_id).select_related('submission')
+        queryset = ContestSubmission.objects.filter(
+            problem_id=problem_id
+        ).select_related("submission")
         for model in queryset:
             model.submission.judge(rejudge=True)
 
-        self.message_user(request, ungettext('%d submission was successfully scheduled for rejudging.',
-                                             '%d submissions were successfully scheduled for rejudging.',
-                                             len(queryset)) % len(queryset))
-        return HttpResponseRedirect(reverse('admin:judge_contest_change', args=(contest_id,)))
+        self.message_user(
+            request,
+            ungettext(
+                "%d submission was successfully scheduled for rejudging.",
+                "%d submissions were successfully scheduled for rejudging.",
+                len(queryset),
+            )
+            % len(queryset),
+        )
+        return HttpResponseRedirect(
+            reverse("admin:judge_contest_change", args=(contest_id,))
+        )
 
     def rate_all_view(self, request):
-        if not request.user.has_perm('judge.contest_rating'):
+        if not request.user.has_perm("judge.contest_rating"):
             raise PermissionDenied()
         with transaction.atomic():
             with connection.cursor() as cursor:
-                cursor.execute('TRUNCATE TABLE `%s`' % Rating._meta.db_table)
+                cursor.execute("TRUNCATE TABLE `%s`" % Rating._meta.db_table)
             Profile.objects.update(rating=None)
-            for contest in Contest.objects.filter(is_rated=True, end_time__lte=timezone.now()).order_by('end_time'):
+            for contest in Contest.objects.filter(
+                is_rated=True, end_time__lte=timezone.now()
+            ).order_by("end_time"):
                 rate_contest(contest)
-        return HttpResponseRedirect(reverse('admin:judge_contest_changelist'))
+        return HttpResponseRedirect(reverse("admin:judge_contest_changelist"))
 
     def rate_view(self, request, id):
-        if not request.user.has_perm('judge.contest_rating'):
+        if not request.user.has_perm("judge.contest_rating"):
             raise PermissionDenied()
         contest = get_object_or_404(Contest, id=id)
         if not contest.is_rated or not contest.ended:
             raise Http404()
         with transaction.atomic():
             contest.rate()
-        return HttpResponseRedirect(request.META.get('HTTP_REFERER', reverse('admin:judge_contest_changelist')))
+        return HttpResponseRedirect(
+            request.META.get("HTTP_REFERER", reverse("admin:judge_contest_changelist"))
+        )
 
     def get_form(self, request, obj=None, **kwargs):
         form = super(ContestAdmin, self).get_form(request, obj, **kwargs)
-        if 'problem_label_script' in form.base_fields:
+        if "problem_label_script" in form.base_fields:
             # form.base_fields['problem_label_script'] does not exist when the user has only view permission
             # on the model.
-            form.base_fields['problem_label_script'].widget = AceWidget('lua', request.profile.ace_theme)
+            form.base_fields["problem_label_script"].widget = AceWidget(
+                "lua", request.profile.ace_theme
+            )
 
-        perms = ('edit_own_contest', 'edit_all_contest')
-        form.base_fields['curators'].queryset = Profile.objects.filter(
-            Q(user__is_superuser=True) |
-            Q(user__groups__permissions__codename__in=perms) |
-            Q(user__user_permissions__codename__in=perms),
+        perms = ("edit_own_contest", "edit_all_contest")
+        form.base_fields["curators"].queryset = Profile.objects.filter(
+            Q(user__is_superuser=True)
+            | Q(user__groups__permissions__codename__in=perms)
+            | Q(user__user_permissions__codename__in=perms),
         ).distinct()
         return form
 
@@ -276,29 +412,48 @@ class ContestAdmin(CompareVersionAdmin):
 class ContestParticipationForm(ModelForm):
     class Meta:
         widgets = {
-            'contest': AdminSelect2Widget(),
-            'user': AdminHeavySelect2Widget(data_view='profile_select2'),
+            "contest": AdminSelect2Widget(),
+            "user": AdminHeavySelect2Widget(data_view="profile_select2"),
         }
 
 
 class ContestParticipationAdmin(admin.ModelAdmin):
-    fields = ('contest', 'user', 'real_start', 'virtual', 'is_disqualified')
-    list_display = ('contest', 'username', 'show_virtual', 'real_start', 'score', 'cumtime', 'tiebreaker')
-    actions = ['recalculate_results']
+    fields = ("contest", "user", "real_start", "virtual", "is_disqualified")
+    list_display = (
+        "contest",
+        "username",
+        "show_virtual",
+        "real_start",
+        "score",
+        "cumtime",
+        "tiebreaker",
+    )
+    actions = ["recalculate_results"]
     actions_on_bottom = actions_on_top = True
-    search_fields = ('contest__key', 'contest__name', 'user__user__username')
+    search_fields = ("contest__key", "contest__name", "user__user__username")
     form = ContestParticipationForm
-    date_hierarchy = 'real_start'
+    date_hierarchy = "real_start"
 
     def get_queryset(self, request):
-        return super(ContestParticipationAdmin, self).get_queryset(request).only(
-            'contest__name', 'contest__format_name', 'contest__format_config',
-            'user__user__username', 'real_start', 'score', 'cumtime', 'tiebreaker', 'virtual',
+        return (
+            super(ContestParticipationAdmin, self)
+            .get_queryset(request)
+            .only(
+                "contest__name",
+                "contest__format_name",
+                "contest__format_config",
+                "user__user__username",
+                "real_start",
+                "score",
+                "cumtime",
+                "tiebreaker",
+                "virtual",
+            )
         )
 
     def save_model(self, request, obj, form, change):
         super().save_model(request, obj, form, change)
-        if form.changed_data and 'is_disqualified' in form.changed_data:
+        if form.changed_data and "is_disqualified" in form.changed_data:
             obj.set_disqualified(obj.is_disqualified)
 
     def recalculate_results(self, request, queryset):
@@ -306,17 +461,26 @@ class ContestParticipationAdmin(admin.ModelAdmin):
         for participation in queryset:
             participation.recompute_results()
             count += 1
-        self.message_user(request, ungettext('%d participation recalculated.',
-                                             '%d participations recalculated.',
-                                             count) % count)
-    recalculate_results.short_description = _('Recalculate results')
+        self.message_user(
+            request,
+            ungettext(
+                "%d participation recalculated.",
+                "%d participations recalculated.",
+                count,
+            )
+            % count,
+        )
+
+    recalculate_results.short_description = _("Recalculate results")
 
     def username(self, obj):
         return obj.user.username
-    username.short_description = _('username')
-    username.admin_order_field = 'user__user__username'
+
+    username.short_description = _("username")
+    username.admin_order_field = "user__user__username"
 
     def show_virtual(self, obj):
-        return obj.virtual or '-'
-    show_virtual.short_description = _('virtual')
-    show_virtual.admin_order_field = 'virtual'
+        return obj.virtual or "-"
+
+    show_virtual.short_description = _("virtual")
+    show_virtual.admin_order_field = "virtual"

judge/admin/interface.py

@@ -11,23 +11,28 @@ from reversion_compare.admin import CompareVersionAdmin
 
 from judge.dblock import LockModel
 from judge.models import NavigationBar
-from judge.widgets import AdminHeavySelect2MultipleWidget, AdminHeavySelect2Widget, HeavyPreviewAdminPageDownWidget
+from judge.widgets import (
+    AdminHeavySelect2MultipleWidget,
+    AdminHeavySelect2Widget,
+    HeavyPreviewAdminPageDownWidget,
+)
 
 
 class NavigationBarAdmin(DraggableMPTTAdmin):
-    list_display = DraggableMPTTAdmin.list_display + ('key', 'linked_path')
-    fields = ('key', 'label', 'path', 'order', 'regex', 'parent')
+    list_display = DraggableMPTTAdmin.list_display + ("key", "linked_path")
+    fields = ("key", "label", "path", "order", "regex", "parent")
     list_editable = ()  # Bug in SortableModelAdmin: 500 without list_editable being set
     mptt_level_indent = 20
-    sortable = 'order'
+    sortable = "order"
 
     def __init__(self, *args, **kwargs):
         super(NavigationBarAdmin, self).__init__(*args, **kwargs)
         self.__save_model_calls = 0
 
     def linked_path(self, obj):
-        return format_html(u'<a href="{0}" target="_blank">{0}</a>', obj.path)
-    linked_path.short_description = _('link path')
+        return format_html('<a href="{0}" target="_blank">{0}</a>', obj.path)
+
+    linked_path.short_description = _("link path")
 
     def save_model(self, request, obj, form, change):
         self.__save_model_calls += 1
@@ -36,7 +41,9 @@ class NavigationBarAdmin(DraggableMPTTAdmin):
     def changelist_view(self, request, extra_context=None):
         self.__save_model_calls = 0
         with NavigationBar.objects.disable_mptt_updates():
-            result = super(NavigationBarAdmin, self).changelist_view(request, extra_context)
+            result = super(NavigationBarAdmin, self).changelist_view(
+                request, extra_context
+            )
         if self.__save_model_calls:
             with LockModel(write=(NavigationBar,)):
                 NavigationBar.objects.rebuild()
@@ -46,74 +53,105 @@ class NavigationBarAdmin(DraggableMPTTAdmin):
 class BlogPostForm(ModelForm):
     def __init__(self, *args, **kwargs):
         super(BlogPostForm, self).__init__(*args, **kwargs)
-        self.fields['authors'].widget.can_add_related = False
+        self.fields["authors"].widget.can_add_related = False
 
     class Meta:
         widgets = {
-            'authors': AdminHeavySelect2MultipleWidget(data_view='profile_select2', attrs={'style': 'width: 100%'}),
-            'organizations': AdminHeavySelect2MultipleWidget(data_view='organization_select2',
-                                                             attrs={'style': 'width: 100%'}),
+            "authors": AdminHeavySelect2MultipleWidget(
+                data_view="profile_select2", attrs={"style": "width: 100%"}
+            ),
+            "organizations": AdminHeavySelect2MultipleWidget(
+                data_view="organization_select2", attrs={"style": "width: 100%"}
+            ),
         }
 
         if HeavyPreviewAdminPageDownWidget is not None:
-            widgets['content'] = HeavyPreviewAdminPageDownWidget(preview=reverse_lazy('blog_preview'))
-            widgets['summary'] = HeavyPreviewAdminPageDownWidget(preview=reverse_lazy('blog_preview'))
+            widgets["content"] = HeavyPreviewAdminPageDownWidget(
+                preview=reverse_lazy("blog_preview")
+            )
+            widgets["summary"] = HeavyPreviewAdminPageDownWidget(
+                preview=reverse_lazy("blog_preview")
+            )
 
 
 class BlogPostAdmin(CompareVersionAdmin):
     fieldsets = (
-        (None, {'fields': ('title', 'slug', 'authors', 'visible', 'sticky', 'publish_on',
-                           'is_organization_private', 'organizations')}),
-        (_('Content'), {'fields': ('content', 'og_image')}),
-        (_('Summary'), {'classes': ('collapse',), 'fields': ('summary',)}),
+        (
+            None,
+            {
+                "fields": (
+                    "title",
+                    "slug",
+                    "authors",
+                    "visible",
+                    "sticky",
+                    "publish_on",
+                    "is_organization_private",
+                    "organizations",
                 )
-    prepopulated_fields = {'slug': ('title',)}
-    list_display = ('id', 'title', 'visible', 'sticky', 'publish_on')
-    list_display_links = ('id', 'title')
-    ordering = ('-publish_on',)
+            },
+        ),
+        (_("Content"), {"fields": ("content", "og_image")}),
+        (_("Summary"), {"classes": ("collapse",), "fields": ("summary",)}),
+    )
+    prepopulated_fields = {"slug": ("title",)}
+    list_display = ("id", "title", "visible", "sticky", "publish_on")
+    list_display_links = ("id", "title")
+    ordering = ("-publish_on",)
     form = BlogPostForm
-    date_hierarchy = 'publish_on'
+    date_hierarchy = "publish_on"
 
     def has_change_permission(self, request, obj=None):
-        return (request.user.has_perm('judge.edit_all_post') or
-                request.user.has_perm('judge.change_blogpost') and (
-                    obj is None or
-                    obj.authors.filter(id=request.profile.id).exists()))
+        return (
+            request.user.has_perm("judge.edit_all_post")
+            or request.user.has_perm("judge.change_blogpost")
+            and (obj is None or obj.authors.filter(id=request.profile.id).exists())
+        )
 
 
 class SolutionForm(ModelForm):
     def __init__(self, *args, **kwargs):
         super(SolutionForm, self).__init__(*args, **kwargs)
-        self.fields['authors'].widget.can_add_related = False
+        self.fields["authors"].widget.can_add_related = False
 
     class Meta:
         widgets = {
-            'authors': AdminHeavySelect2MultipleWidget(data_view='profile_select2', attrs={'style': 'width: 100%'}),
-            'problem': AdminHeavySelect2Widget(data_view='problem_select2', attrs={'style': 'width: 250px'}),
+            "authors": AdminHeavySelect2MultipleWidget(
+                data_view="profile_select2", attrs={"style": "width: 100%"}
+            ),
+            "problem": AdminHeavySelect2Widget(
+                data_view="problem_select2", attrs={"style": "width: 250px"}
+            ),
         }
 
         if HeavyPreviewAdminPageDownWidget is not None:
-            widgets['content'] = HeavyPreviewAdminPageDownWidget(preview=reverse_lazy('solution_preview'))
+            widgets["content"] = HeavyPreviewAdminPageDownWidget(
+                preview=reverse_lazy("solution_preview")
+            )
 
 
 class LicenseForm(ModelForm):
     class Meta:
         if HeavyPreviewAdminPageDownWidget is not None:
-            widgets = {'text': HeavyPreviewAdminPageDownWidget(preview=reverse_lazy('license_preview'))}
+            widgets = {
+                "text": HeavyPreviewAdminPageDownWidget(
+                    preview=reverse_lazy("license_preview")
+                )
+            }
 
 
 class LicenseAdmin(admin.ModelAdmin):
-    fields = ('key', 'link', 'name', 'display', 'icon', 'text')
-    list_display = ('name', 'key')
+    fields = ("key", "link", "name", "display", "icon", "text")
+    list_display = ("name", "key")
     form = LicenseForm
 
 
 class UserListFilter(admin.SimpleListFilter):
-    title = _('user')
-    parameter_name = 'user'
+    title = _("user")
+    parameter_name = "user"
 
     def lookups(self, request, model_admin):
-        return User.objects.filter(is_staff=True).values_list('id', 'username')
+        return User.objects.filter(is_staff=True).values_list("id", "username")
 
     def queryset(self, request, queryset):
         if self.value():
@@ -122,10 +160,24 @@ class UserListFilter(admin.SimpleListFilter):
 
 
 class LogEntryAdmin(admin.ModelAdmin):
-    readonly_fields = ('user', 'content_type', 'object_id', 'object_repr', 'action_flag', 'change_message')
-    list_display = ('__str__', 'action_time', 'user', 'content_type', 'object_link', 'diff_link')
-    search_fields = ('object_repr', 'change_message')
-    list_filter = (UserListFilter, 'content_type')
+    readonly_fields = (
+        "user",
+        "content_type",
+        "object_id",
+        "object_repr",
+        "action_flag",
+        "change_message",
+    )
+    list_display = (
+        "__str__",
+        "action_time",
+        "user",
+        "content_type",
+        "object_link",
+        "diff_link",
+    )
+    search_fields = ("object_repr", "change_message")
+    list_filter = (UserListFilter, "content_type")
     list_display_links = None
     actions = None
 
@@ -144,25 +196,35 @@ class LogEntryAdmin(admin.ModelAdmin):
         else:
             ct = obj.content_type
             try:
-                link = format_html('<a href="{1}">{0}</a>', obj.object_repr,
-                                   reverse('admin:%s_%s_change' % (ct.app_label, ct.model), args=(obj.object_id,)))
+                link = format_html(
+                    '<a href="{1}">{0}</a>',
+                    obj.object_repr,
+                    reverse(
+                        "admin:%s_%s_change" % (ct.app_label, ct.model),
+                        args=(obj.object_id,),
+                    ),
+                )
             except NoReverseMatch:
                 link = obj.object_repr
         return link
-    object_link.admin_order_field = 'object_repr'
-    object_link.short_description = _('object')
+
+    object_link.admin_order_field = "object_repr"
+    object_link.short_description = _("object")
 
     def diff_link(self, obj):
         if obj.is_deletion():
             return None
         ct = obj.content_type
         try:
-            url = reverse('admin:%s_%s_history' % (ct.app_label, ct.model), args=(obj.object_id,))
-            link = format_html('<a href="{1}">{0}</a>', _('Diff'), url)
+            url = reverse(
+                "admin:%s_%s_history" % (ct.app_label, ct.model), args=(obj.object_id,)
+            )
+            link = format_html('<a href="{1}">{0}</a>', _("Diff"), url)
         except NoReverseMatch:
             link = None
         return link
-    diff_link.short_description = _('diff')
+
+    diff_link.short_description = _("diff")
 
     def queryset(self, request):
-        return super().queryset(request).prefetch_related('content_type')
+        return super().queryset(request).prefetch_related("content_type")

judge/admin/organization.py

@@ -6,61 +6,88 @@ from django.utils.translation import gettext, gettext_lazy as _
 from reversion.admin import VersionAdmin
 
 from judge.models import Organization
-from judge.widgets import AdminHeavySelect2MultipleWidget, AdminHeavySelect2Widget, HeavyPreviewAdminPageDownWidget
+from judge.widgets import (
+    AdminHeavySelect2MultipleWidget,
+    AdminHeavySelect2Widget,
+    HeavyPreviewAdminPageDownWidget,
+)
 
 
 class OrganizationForm(ModelForm):
     class Meta:
         widgets = {
-            'admins': AdminHeavySelect2MultipleWidget(data_view='profile_select2'),
-            'registrant': AdminHeavySelect2Widget(data_view='profile_select2'),
+            "admins": AdminHeavySelect2MultipleWidget(data_view="profile_select2"),
+            "registrant": AdminHeavySelect2Widget(data_view="profile_select2"),
         }
         if HeavyPreviewAdminPageDownWidget is not None:
-            widgets['about'] = HeavyPreviewAdminPageDownWidget(preview=reverse_lazy('organization_preview'))
+            widgets["about"] = HeavyPreviewAdminPageDownWidget(
+                preview=reverse_lazy("organization_preview")
+            )
 
 
 class OrganizationAdmin(VersionAdmin):
-    readonly_fields = ('creation_date',)
-    fields = ('name', 'slug', 'short_name', 'is_open', 'about', 'logo_override_image', 'slots', 'registrant',
-              'creation_date', 'admins')
-    list_display = ('name', 'short_name', 'is_open', 'slots', 'registrant', 'show_public')
-    prepopulated_fields = {'slug': ('name',)}
+    readonly_fields = ("creation_date",)
+    fields = (
+        "name",
+        "slug",
+        "short_name",
+        "is_open",
+        "about",
+        "logo_override_image",
+        "slots",
+        "registrant",
+        "creation_date",
+        "admins",
+    )
+    list_display = (
+        "name",
+        "short_name",
+        "is_open",
+        "slots",
+        "registrant",
+        "show_public",
+    )
+    prepopulated_fields = {"slug": ("name",)}
     actions_on_top = True
     actions_on_bottom = True
     form = OrganizationForm
 
     def show_public(self, obj):
-        return format_html('<a href="{0}" style="white-space:nowrap;">{1}</a>',
-                           obj.get_absolute_url(), gettext('View on site'))
+        return format_html(
+            '<a href="{0}" style="white-space:nowrap;">{1}</a>',
+            obj.get_absolute_url(),
+            gettext("View on site"),
+        )
 
-    show_public.short_description = ''
+    show_public.short_description = ""
 
     def get_readonly_fields(self, request, obj=None):
         fields = self.readonly_fields
-        if not request.user.has_perm('judge.organization_admin'):
-            return fields + ('registrant', 'admins', 'is_open', 'slots')
+        if not request.user.has_perm("judge.organization_admin"):
+            return fields + ("registrant", "admins", "is_open", "slots")
         return fields
 
     def get_queryset(self, request):
         queryset = Organization.objects.all()
-        if request.user.has_perm('judge.edit_all_organization'):
+        if request.user.has_perm("judge.edit_all_organization"):
             return queryset
         else:
             return queryset.filter(admins=request.profile.id)
 
     def has_change_permission(self, request, obj=None):
-        if not request.user.has_perm('judge.change_organization'):
+        if not request.user.has_perm("judge.change_organization"):
             return False
-        if request.user.has_perm('judge.edit_all_organization') or obj is None:
+        if request.user.has_perm("judge.edit_all_organization") or obj is None:
             return True
         return obj.admins.filter(id=request.profile.id).exists()
 
 
 class OrganizationRequestAdmin(admin.ModelAdmin):
-    list_display = ('username', 'organization', 'state', 'time')
-    readonly_fields = ('user', 'organization')
+    list_display = ("username", "organization", "state", "time")
+    readonly_fields = ("user", "organization")
 
     def username(self, obj):
         return obj.user.user.username
-    username.short_description = _('username')
-    username.admin_order_field = 'user__user__username'
+
+    username.short_description = _("username")
+    username.admin_order_field = "user__user__username"

judge/admin/problem.py

@@ -14,45 +14,74 @@ from reversion.admin import VersionAdmin
 from reversion_compare.admin import CompareVersionAdmin
 
 
-from judge.models import LanguageLimit, Problem, ProblemClarification, ProblemTranslation, Profile, Solution
-from judge.widgets import AdminHeavySelect2MultipleWidget, AdminSelect2MultipleWidget, AdminSelect2Widget, \
-    CheckboxSelectMultipleWithSelectAll, HeavyPreviewAdminPageDownWidget, HeavyPreviewPageDownWidget
+from judge.models import (
+    LanguageLimit,
+    Problem,
+    ProblemClarification,
+    ProblemTranslation,
+    Profile,
+    Solution,
+)
+from judge.widgets import (
+    AdminHeavySelect2MultipleWidget,
+    AdminSelect2MultipleWidget,
+    AdminSelect2Widget,
+    CheckboxSelectMultipleWithSelectAll,
+    HeavyPreviewAdminPageDownWidget,
+    HeavyPreviewPageDownWidget,
+)
 
 
 class ProblemForm(ModelForm):
-    change_message = forms.CharField(max_length=256, label='Edit reason', required=False)
+    change_message = forms.CharField(
+        max_length=256, label="Edit reason", required=False
+    )
 
     def __init__(self, *args, **kwargs):
         super(ProblemForm, self).__init__(*args, **kwargs)
-        self.fields['authors'].widget.can_add_related = False
-        self.fields['curators'].widget.can_add_related = False
-        self.fields['testers'].widget.can_add_related = False
-        self.fields['banned_users'].widget.can_add_related = False
-        self.fields['change_message'].widget.attrs.update({
-            'placeholder': gettext('Describe the changes you made (optional)'),
-        })
+        self.fields["authors"].widget.can_add_related = False
+        self.fields["curators"].widget.can_add_related = False
+        self.fields["testers"].widget.can_add_related = False
+        self.fields["banned_users"].widget.can_add_related = False
+        self.fields["change_message"].widget.attrs.update(
+            {
+                "placeholder": gettext("Describe the changes you made (optional)"),
+            }
+        )
 
     class Meta:
         widgets = {
-            'authors': AdminHeavySelect2MultipleWidget(data_view='profile_select2', attrs={'style': 'width: 100%'}),
-            'curators': AdminHeavySelect2MultipleWidget(data_view='profile_select2', attrs={'style': 'width: 100%'}),
-            'testers': AdminHeavySelect2MultipleWidget(data_view='profile_select2', attrs={'style': 'width: 100%'}),
-            'banned_users': AdminHeavySelect2MultipleWidget(data_view='profile_select2',
-                                                            attrs={'style': 'width: 100%'}),
-            'organizations': AdminHeavySelect2MultipleWidget(data_view='organization_select2',
-                                                             attrs={'style': 'width: 100%'}),
-            'types': AdminSelect2MultipleWidget,
-            'group': AdminSelect2Widget,
+            "authors": AdminHeavySelect2MultipleWidget(
+                data_view="profile_select2", attrs={"style": "width: 100%"}
+            ),
+            "curators": AdminHeavySelect2MultipleWidget(
+                data_view="profile_select2", attrs={"style": "width: 100%"}
+            ),
+            "testers": AdminHeavySelect2MultipleWidget(
+                data_view="profile_select2", attrs={"style": "width: 100%"}
+            ),
+            "banned_users": AdminHeavySelect2MultipleWidget(
+                data_view="profile_select2", attrs={"style": "width: 100%"}
+            ),
+            "organizations": AdminHeavySelect2MultipleWidget(
+                data_view="organization_select2", attrs={"style": "width: 100%"}
+            ),
+            "types": AdminSelect2MultipleWidget,
+            "group": AdminSelect2Widget,
         }
         if HeavyPreviewAdminPageDownWidget is not None:
-            widgets['description'] = HeavyPreviewAdminPageDownWidget(preview=reverse_lazy('problem_preview'))
+            widgets["description"] = HeavyPreviewAdminPageDownWidget(
+                preview=reverse_lazy("problem_preview")
+            )
 
 
 class ProblemCreatorListFilter(admin.SimpleListFilter):
-    title = parameter_name = 'creator'
+    title = parameter_name = "creator"
 
     def lookups(self, request, model_admin):
-        queryset = Profile.objects.exclude(authored_problems=None).values_list('user__username', flat=True)
+        queryset = Profile.objects.exclude(authored_problems=None).values_list(
+            "user__username", flat=True
+        )
         return [(name, name) for name in queryset]
 
     def queryset(self, request, queryset):
@@ -63,24 +92,28 @@ class ProblemCreatorListFilter(admin.SimpleListFilter):
 
 class LanguageLimitInlineForm(ModelForm):
     class Meta:
-        widgets = {'language': AdminSelect2Widget}
+        widgets = {"language": AdminSelect2Widget}
 
 
 class LanguageLimitInline(admin.TabularInline):
     model = LanguageLimit
-    fields = ('language', 'time_limit', 'memory_limit')
+    fields = ("language", "time_limit", "memory_limit")
     form = LanguageLimitInlineForm
 
 
 class ProblemClarificationForm(ModelForm):
     class Meta:
         if HeavyPreviewPageDownWidget is not None:
-            widgets = {'description': HeavyPreviewPageDownWidget(preview=reverse_lazy('comment_preview'))}
+            widgets = {
+                "description": HeavyPreviewPageDownWidget(
+                    preview=reverse_lazy("comment_preview")
+                )
+            }
 
 
 class ProblemClarificationInline(admin.StackedInline):
     model = ProblemClarification
-    fields = ('description',)
+    fields = ("description",)
     form = ProblemClarificationForm
     extra = 0
 
@@ -88,20 +121,24 @@ class ProblemClarificationInline(admin.StackedInline):
 class ProblemSolutionForm(ModelForm):
     def __init__(self, *args, **kwargs):
         super(ProblemSolutionForm, self).__init__(*args, **kwargs)
-        self.fields['authors'].widget.can_add_related = False
+        self.fields["authors"].widget.can_add_related = False
 
     class Meta:
         widgets = {
-            'authors': AdminHeavySelect2MultipleWidget(data_view='profile_select2', attrs={'style': 'width: 100%'}),
+            "authors": AdminHeavySelect2MultipleWidget(
+                data_view="profile_select2", attrs={"style": "width: 100%"}
+            ),
         }
 
         if HeavyPreviewAdminPageDownWidget is not None:
-            widgets['content'] = HeavyPreviewAdminPageDownWidget(preview=reverse_lazy('solution_preview'))
+            widgets["content"] = HeavyPreviewAdminPageDownWidget(
+                preview=reverse_lazy("solution_preview")
+            )
 
 
 class ProblemSolutionInline(admin.StackedInline):
     model = Solution
-    fields = ('is_public', 'publish_on', 'authors', 'content')
+    fields = ("is_public", "publish_on", "authors", "content")
     form = ProblemSolutionForm
     extra = 0
 
@@ -109,168 +146,250 @@ class ProblemSolutionInline(admin.StackedInline):
 class ProblemTranslationForm(ModelForm):
     class Meta:
         if HeavyPreviewAdminPageDownWidget is not None:
-            widgets = {'description': HeavyPreviewAdminPageDownWidget(preview=reverse_lazy('problem_preview'))}
+            widgets = {
+                "description": HeavyPreviewAdminPageDownWidget(
+                    preview=reverse_lazy("problem_preview")
+                )
+            }
 
 
 class ProblemTranslationInline(admin.StackedInline):
     model = ProblemTranslation
-    fields = ('language', 'name', 'description')
+    fields = ("language", "name", "description")
     form = ProblemTranslationForm
     extra = 0
 
 
 class ProblemAdmin(CompareVersionAdmin):
     fieldsets = (
-        (None, {
-            'fields': (
-                'code', 'name', 'is_public', 'is_manually_managed', 'date', 'authors', 'curators', 'testers',
-                'is_organization_private', 'organizations', 'description', 'license',
+        (
+            None,
+            {
+                "fields": (
+                    "code",
+                    "name",
+                    "is_public",
+                    "is_manually_managed",
+                    "date",
+                    "authors",
+                    "curators",
+                    "testers",
+                    "is_organization_private",
+                    "organizations",
+                    "description",
+                    "license",
                 ),
-        }),
-        (_('Social Media'), {'classes': ('collapse',), 'fields': ('og_image', 'summary')}),
-        (_('Taxonomy'), {'fields': ('types', 'group')}),
-        (_('Points'), {'fields': (('points', 'partial'), 'short_circuit')}),
-        (_('Limits'), {'fields': ('time_limit', 'memory_limit')}),
-        (_('Language'), {'fields': ('allowed_languages',)}),
-        (_('Justice'), {'fields': ('banned_users',)}),
-        (_('History'), {'fields': ('change_message',)}),
+            },
+        ),
+        (
+            _("Social Media"),
+            {"classes": ("collapse",), "fields": ("og_image", "summary")},
+        ),
+        (_("Taxonomy"), {"fields": ("types", "group")}),
+        (_("Points"), {"fields": (("points", "partial"), "short_circuit")}),
+        (_("Limits"), {"fields": ("time_limit", "memory_limit")}),
+        (_("Language"), {"fields": ("allowed_languages",)}),
+        (_("Justice"), {"fields": ("banned_users",)}),
+        (_("History"), {"fields": ("change_message",)}),
     )
-    list_display = ['code', 'name', 'show_authors', 'points', 'vote_cnt', 'vote_mean', 'vote_median', 'vote_std', 'is_public', 'show_public']
-    ordering = ['code']
-    search_fields = ('code', 'name', 'authors__user__username', 'curators__user__username')
-    inlines = [LanguageLimitInline, ProblemClarificationInline, ProblemSolutionInline, ProblemTranslationInline]
+    list_display = [
+        "code",
+        "name",
+        "show_authors",
+        "points",
+        "vote_cnt",
+        "vote_mean",
+        "vote_median",
+        "vote_std",
+        "is_public",
+        "show_public",
+    ]
+    ordering = ["code"]
+    search_fields = (
+        "code",
+        "name",
+        "authors__user__username",
+        "curators__user__username",
+    )
+    inlines = [
+        LanguageLimitInline,
+        ProblemClarificationInline,
+        ProblemSolutionInline,
+        ProblemTranslationInline,
+    ]
     list_max_show_all = 1000
     actions_on_top = True
     actions_on_bottom = True
-    list_filter = ('is_public', ProblemCreatorListFilter)
+    list_filter = ("is_public", ProblemCreatorListFilter)
     form = ProblemForm
-    date_hierarchy = 'date'
+    date_hierarchy = "date"
 
     def get_actions(self, request):
         actions = super(ProblemAdmin, self).get_actions(request)
 
-        if request.user.has_perm('judge.change_public_visibility'):
-            func, name, desc = self.get_action('make_public')
+        if request.user.has_perm("judge.change_public_visibility"):
+            func, name, desc = self.get_action("make_public")
             actions[name] = (func, name, desc)
 
-            func, name, desc = self.get_action('make_private')
+            func, name, desc = self.get_action("make_private")
             actions[name] = (func, name, desc)
 
         return actions
 
     def get_readonly_fields(self, request, obj=None):
         fields = self.readonly_fields
-        if not request.user.has_perm('judge.change_public_visibility'):
-            fields += ('is_public',)
-        if not request.user.has_perm('judge.change_manually_managed'):
-            fields += ('is_manually_managed',)
+        if not request.user.has_perm("judge.change_public_visibility"):
+            fields += ("is_public",)
+        if not request.user.has_perm("judge.change_manually_managed"):
+            fields += ("is_manually_managed",)
         return fields
 
     def show_authors(self, obj):
-        return ', '.join(map(attrgetter('user.username'), obj.authors.all()))
+        return ", ".join(map(attrgetter("user.username"), obj.authors.all()))
 
-    show_authors.short_description = _('Authors')
+    show_authors.short_description = _("Authors")
 
     def show_public(self, obj):
-        return format_html('<a href="{1}">{0}</a>', gettext('View on site'), obj.get_absolute_url())
+        return format_html(
+            '<a href="{1}">{0}</a>', gettext("View on site"), obj.get_absolute_url()
+        )
 
-    show_public.short_description = ''
+    show_public.short_description = ""
 
     def _rescore(self, request, problem_id):
         from judge.tasks import rescore_problem
+
         transaction.on_commit(rescore_problem.s(problem_id).delay)
 
     def make_public(self, request, queryset):
         count = queryset.update(is_public=True)
-        for problem_id in queryset.values_list('id', flat=True):
+        for problem_id in queryset.values_list("id", flat=True):
             self._rescore(request, problem_id)
-        self.message_user(request, ungettext('%d problem successfully marked as public.',
-                                             '%d problems successfully marked as public.',
-                                             count) % count)
+        self.message_user(
+            request,
+            ungettext(
+                "%d problem successfully marked as public.",
+                "%d problems successfully marked as public.",
+                count,
+            )
+            % count,
+        )
 
-    make_public.short_description = _('Mark problems as public')
+    make_public.short_description = _("Mark problems as public")
 
     def make_private(self, request, queryset):
         count = queryset.update(is_public=False)
-        for problem_id in queryset.values_list('id', flat=True):
+        for problem_id in queryset.values_list("id", flat=True):
             self._rescore(request, problem_id)
-        self.message_user(request, ungettext('%d problem successfully marked as private.',
-                                             '%d problems successfully marked as private.',
-                                             count) % count)
+        self.message_user(
+            request,
+            ungettext(
+                "%d problem successfully marked as private.",
+                "%d problems successfully marked as private.",
+                count,
+            )
+            % count,
+        )
 
-    make_private.short_description = _('Mark problems as private')
+    make_private.short_description = _("Mark problems as private")
 
     def get_queryset(self, request):
-        queryset = Problem.objects.prefetch_related('authors__user')
+        queryset = Problem.objects.prefetch_related("authors__user")
         queryset = queryset.annotate(
-            _vote_mean=Avg('problem_points_votes__points'),
-            _vote_std=StdDev('problem_points_votes__points'),
-            _vote_cnt=Count('problem_points_votes__points')
+            _vote_mean=Avg("problem_points_votes__points"),
+            _vote_std=StdDev("problem_points_votes__points"),
+            _vote_cnt=Count("problem_points_votes__points"),
         )
-        if request.user.has_perm('judge.edit_all_problem'):
+        if request.user.has_perm("judge.edit_all_problem"):
             return queryset
 
         access = Q()
-        if request.user.has_perm('judge.edit_public_problem'):
+        if request.user.has_perm("judge.edit_public_problem"):
             access |= Q(is_public=True)
-        if request.user.has_perm('judge.edit_own_problem'):
-            access |= Q(authors__id=request.profile.id) | Q(curators__id=request.profile.id)
+        if request.user.has_perm("judge.edit_own_problem"):
+            access |= Q(authors__id=request.profile.id) | Q(
+                curators__id=request.profile.id
+            )
         return queryset.filter(access).distinct() if access else queryset.none()
 
     def has_change_permission(self, request, obj=None):
-        if request.user.has_perm('judge.edit_all_problem') or obj is None:
+        if request.user.has_perm("judge.edit_all_problem") or obj is None:
             return True
-        if request.user.has_perm('judge.edit_public_problem') and obj.is_public:
+        if request.user.has_perm("judge.edit_public_problem") and obj.is_public:
             return True
-        if not request.user.has_perm('judge.edit_own_problem'):
+        if not request.user.has_perm("judge.edit_own_problem"):
             return False
         return obj.is_editor(request.profile)
 
     def formfield_for_manytomany(self, db_field, request=None, **kwargs):
-        if db_field.name == 'allowed_languages':
-            kwargs['widget'] = CheckboxSelectMultipleWithSelectAll()
-        return super(ProblemAdmin, self).formfield_for_manytomany(db_field, request, **kwargs)
+        if db_field.name == "allowed_languages":
+            kwargs["widget"] = CheckboxSelectMultipleWithSelectAll()
+        return super(ProblemAdmin, self).formfield_for_manytomany(
+            db_field, request, **kwargs
+        )
 
     def get_form(self, *args, **kwargs):
         form = super(ProblemAdmin, self).get_form(*args, **kwargs)
-        form.base_fields['authors'].queryset = Profile.objects.all()
+        form.base_fields["authors"].queryset = Profile.objects.all()
         return form
 
     def save_model(self, request, obj, form, change):
         super().save_model(request, obj, form, change)
-        if form.changed_data and any(f in form.changed_data for f in ('is_public', 'points', 'partial')):
+        if form.changed_data and any(
+            f in form.changed_data for f in ("is_public", "points", "partial")
+        ):
             self._rescore(request, obj.id)
 
     def construct_change_message(self, request, form, *args, **kwargs):
-        if form.cleaned_data.get('change_message'):
-            return form.cleaned_data['change_message']
-        return super(ProblemAdmin, self).construct_change_message(request, form, *args, **kwargs)
+        if form.cleaned_data.get("change_message"):
+            return form.cleaned_data["change_message"]
+        return super(ProblemAdmin, self).construct_change_message(
+            request, form, *args, **kwargs
+        )
 
     def vote_mean(self, obj):
         return round(obj._vote_mean, 1) if obj._vote_mean is not None else None
-    vote_mean.admin_order_field = '_vote_mean'
+
+    vote_mean.admin_order_field = "_vote_mean"
 
     def vote_std(self, obj):
         return round(obj._vote_std, 1) if obj._vote_std is not None else None
-    vote_std.admin_order_field = '_vote_std'
+
+    vote_std.admin_order_field = "_vote_std"
 
     def vote_cnt(self, obj):
         return obj._vote_cnt
-    vote_cnt.admin_order_field = '_vote_cnt'
+
+    vote_cnt.admin_order_field = "_vote_cnt"
 
     def vote_median(self, obj):
-        votes = obj.problem_points_votes.values_list('points', flat=True)
+        votes = obj.problem_points_votes.values_list("points", flat=True)
         return statistics.median(votes) if votes else None
 
 
 class ProblemPointsVoteAdmin(admin.ModelAdmin):
-    list_display = ('vote_points', 'voter', 'voter_rating', 'voter_point', 'problem_name', 'problem_code', 'problem_points')
-    search_fields = ('voter__user__username', 'problem__code', 'problem__name')
-    readonly_fields = ('voter', 'problem', 'problem_code', 'problem_points', 'voter_rating', 'voter_point')
+    list_display = (
+        "vote_points",
+        "voter",
+        "voter_rating",
+        "voter_point",
+        "problem_name",
+        "problem_code",
+        "problem_points",
+    )
+    search_fields = ("voter__user__username", "problem__code", "problem__name")
+    readonly_fields = (
+        "voter",
+        "problem",
+        "problem_code",
+        "problem_points",
+        "voter_rating",
+        "voter_point",
+    )
 
     def has_change_permission(self, request, obj=None):
         if obj is None:
-            return request.user.has_perm('judge.edit_own_problem')
+            return request.user.has_perm("judge.edit_own_problem")
         return obj.problem.is_editable_by(request.user)
 
     def lookup_allowed(self, key, value):
@@ -278,29 +397,35 @@ class ProblemPointsVoteAdmin(admin.ModelAdmin):
 
     def problem_code(self, obj):
         return obj.problem.code
-    problem_code.short_description = _('Problem code')
-    problem_code.admin_order_field = 'problem__code'
+
+    problem_code.short_description = _("Problem code")
+    problem_code.admin_order_field = "problem__code"
 
     def problem_points(self, obj):
         return obj.problem.points
-    problem_points.short_description = _('Points')
-    problem_points.admin_order_field = 'problem__points'
+
+    problem_points.short_description = _("Points")
+    problem_points.admin_order_field = "problem__points"
 
     def problem_name(self, obj):
         return obj.problem.name
-    problem_name.short_description = _('Problem name')
-    problem_name.admin_order_field = 'problem__name'
+
+    problem_name.short_description = _("Problem name")
+    problem_name.admin_order_field = "problem__name"
 
     def voter_rating(self, obj):
         return obj.voter.rating
-    voter_rating.short_description = _('Voter rating')
-    voter_rating.admin_order_field = 'voter__rating'
+
+    voter_rating.short_description = _("Voter rating")
+    voter_rating.admin_order_field = "voter__rating"
 
     def voter_point(self, obj):
         return round(obj.voter.performance_points)
-    voter_point.short_description = _('Voter point')
-    voter_point.admin_order_field = 'voter__performance_points'
+
+    voter_point.short_description = _("Voter point")
+    voter_point.admin_order_field = "voter__performance_points"
 
     def vote_points(self, obj):
         return obj.points
-    vote_points.short_description = _('Vote')
+
+    vote_points.short_description = _("Vote")

judge/admin/profile.py

@@ -12,30 +12,40 @@ from judge.widgets import AdminPagedownWidget, AdminSelect2Widget
 class ProfileForm(ModelForm):
     def __init__(self, *args, **kwargs):
         super(ProfileForm, self).__init__(*args, **kwargs)
-        if 'current_contest' in self.base_fields:
+        if "current_contest" in self.base_fields:
             # form.fields['current_contest'] does not exist when the user has only view permission on the model.
-            self.fields['current_contest'].queryset = self.instance.contest_history.select_related('contest') \
-                .only('contest__name', 'user_id', 'virtual')
-            self.fields['current_contest'].label_from_instance = \
-                lambda obj: '%s v%d' % (obj.contest.name, obj.virtual) if obj.virtual else obj.contest.name
+            self.fields[
+                "current_contest"
+            ].queryset = self.instance.contest_history.select_related("contest").only(
+                "contest__name", "user_id", "virtual"
+            )
+            self.fields["current_contest"].label_from_instance = (
+                lambda obj: "%s v%d" % (obj.contest.name, obj.virtual)
+                if obj.virtual
+                else obj.contest.name
+            )
 
     class Meta:
         widgets = {
-            'timezone': AdminSelect2Widget,
-            'language': AdminSelect2Widget,
-            'ace_theme': AdminSelect2Widget,
-            'current_contest': AdminSelect2Widget,
+            "timezone": AdminSelect2Widget,
+            "language": AdminSelect2Widget,
+            "ace_theme": AdminSelect2Widget,
+            "current_contest": AdminSelect2Widget,
         }
         if AdminPagedownWidget is not None:
-            widgets['about'] = AdminPagedownWidget
+            widgets["about"] = AdminPagedownWidget
 
 
 class TimezoneFilter(admin.SimpleListFilter):
-    title = _('timezone')
-    parameter_name = 'timezone'
+    title = _("timezone")
+    parameter_name = "timezone"
 
     def lookups(self, request, model_admin):
-        return Profile.objects.values_list('timezone', 'timezone').distinct().order_by('timezone')
+        return (
+            Profile.objects.values_list("timezone", "timezone")
+            .distinct()
+            .order_by("timezone")
+        )
 
     def queryset(self, request, queryset):
         if self.value() is None:
@@ -44,75 +54,116 @@ class TimezoneFilter(admin.SimpleListFilter):
 
 
 class ProfileAdmin(VersionAdmin):
-    fields = ('user', 'display_rank', 'about', 'organizations', 'timezone', 'language', 'ace_theme',
-              'math_engine', 'last_access', 'ip', 'mute', 'is_unlisted', 'is_banned_problem_voting', 'notes', 'is_totp_enabled', 'user_script',
-              'current_contest')
-    readonly_fields = ('user',)
-    list_display = ('admin_user_admin', 'email', 'is_totp_enabled', 'timezone_full',
-                    'date_joined', 'last_access', 'ip', 'show_public')
-    ordering = ('user__username',)
-    search_fields = ('user__username', 'ip', 'user__email')
-    list_filter = ('language', TimezoneFilter)
-    actions = ('recalculate_points',)
+    fields = (
+        "user",
+        "display_rank",
+        "about",
+        "organizations",
+        "timezone",
+        "language",
+        "ace_theme",
+        "math_engine",
+        "last_access",
+        "ip",
+        "mute",
+        "is_unlisted",
+        "is_banned_problem_voting",
+        "notes",
+        "is_totp_enabled",
+        "user_script",
+        "current_contest",
+    )
+    readonly_fields = ("user",)
+    list_display = (
+        "admin_user_admin",
+        "email",
+        "is_totp_enabled",
+        "timezone_full",
+        "date_joined",
+        "last_access",
+        "ip",
+        "show_public",
+    )
+    ordering = ("user__username",)
+    search_fields = ("user__username", "ip", "user__email")
+    list_filter = ("language", TimezoneFilter)
+    actions = ("recalculate_points",)
     actions_on_top = True
     actions_on_bottom = True
     form = ProfileForm
 
     def get_queryset(self, request):
-        return super(ProfileAdmin, self).get_queryset(request).select_related('user')
+        return super(ProfileAdmin, self).get_queryset(request).select_related("user")
 
     def get_fields(self, request, obj=None):
-        if request.user.has_perm('judge.totp'):
+        if request.user.has_perm("judge.totp"):
             fields = list(self.fields)
-            fields.insert(fields.index('is_totp_enabled') + 1, 'totp_key')
+            fields.insert(fields.index("is_totp_enabled") + 1, "totp_key")
             return tuple(fields)
         else:
             return self.fields
 
     def get_readonly_fields(self, request, obj=None):
         fields = self.readonly_fields
-        if not request.user.has_perm('judge.totp'):
-            fields += ('is_totp_enabled',)
+        if not request.user.has_perm("judge.totp"):
+            fields += ("is_totp_enabled",)
         return fields
 
     def show_public(self, obj):
-        return format_html('<a href="{0}" style="white-space:nowrap;">{1}</a>',
-                           obj.get_absolute_url(), gettext('View on site'))
-    show_public.short_description = ''
+        return format_html(
+            '<a href="{0}" style="white-space:nowrap;">{1}</a>',
+            obj.get_absolute_url(),
+            gettext("View on site"),
+        )
+
+    show_public.short_description = ""
 
     def admin_user_admin(self, obj):
         return obj.username
-    admin_user_admin.admin_order_field = 'user__username'
-    admin_user_admin.short_description = _('User')
+
+    admin_user_admin.admin_order_field = "user__username"
+    admin_user_admin.short_description = _("User")
 
     def email(self, obj):
         return obj.user.email
-    email.admin_order_field = 'user__email'
-    email.short_description = _('Email')
+
+    email.admin_order_field = "user__email"
+    email.short_description = _("Email")
 
     def timezone_full(self, obj):
         return obj.timezone
-    timezone_full.admin_order_field = 'timezone'
-    timezone_full.short_description = _('Timezone')
+
+    timezone_full.admin_order_field = "timezone"
+    timezone_full.short_description = _("Timezone")
 
     def date_joined(self, obj):
         return obj.user.date_joined
-    date_joined.admin_order_field = 'user__date_joined'
-    date_joined.short_description = _('date joined')
+
+    date_joined.admin_order_field = "user__date_joined"
+    date_joined.short_description = _("date joined")
 
     def recalculate_points(self, request, queryset):
         count = 0
         for profile in queryset:
             profile.calculate_points()
             count += 1
-        self.message_user(request, ungettext('%d user have scores recalculated.',
-                                             '%d users have scores recalculated.',
-                                             count) % count)
-    recalculate_points.short_description = _('Recalculate scores')
+        self.message_user(
+            request,
+            ungettext(
+                "%d user have scores recalculated.",
+                "%d users have scores recalculated.",
+                count,
+            )
+            % count,
+        )
+
+    recalculate_points.short_description = _("Recalculate scores")
 
     def get_form(self, request, obj=None, **kwargs):
         form = super(ProfileAdmin, self).get_form(request, obj, **kwargs)
-        if 'user_script' in form.base_fields:
+        if "user_script" in form.base_fields:
             # form.base_fields['user_script'] does not exist when the user has only view permission on the model.
-            form.base_fields['user_script'].widget = AceWidget('javascript', request.profile.ace_theme)
+            form.base_fields["user_script"].widget = AceWidget(
+                "javascript", request.profile.ace_theme
+            )
         return form

judge/admin/runtime.py

@@ -16,41 +16,63 @@ from judge.widgets import AdminHeavySelect2MultipleWidget, AdminPagedownWidget
 
 class LanguageForm(ModelForm):
     problems = ModelMultipleChoiceField(
-        label=_('Disallowed problems'),
+        label=_("Disallowed problems"),
         queryset=Problem.objects.all(),
         required=False,
-        help_text=_('These problems are NOT allowed to be submitted in this language'),
-        widget=AdminHeavySelect2MultipleWidget(data_view='problem_select2'))
+        help_text=_("These problems are NOT allowed to be submitted in this language"),
+        widget=AdminHeavySelect2MultipleWidget(data_view="problem_select2"),
+    )
 
     class Meta:
         if AdminPagedownWidget is not None:
-            widgets = {'description': AdminPagedownWidget}
+            widgets = {"description": AdminPagedownWidget}
 
 
 class LanguageAdmin(VersionAdmin):
-    fields = ('key', 'name', 'short_name', 'common_name', 'ace', 'pygments', 'info', 'description',
-              'template', 'problems')
-    list_display = ('key', 'name', 'common_name', 'info')
+    fields = (
+        "key",
+        "name",
+        "short_name",
+        "common_name",
+        "ace",
+        "pygments",
+        "info",
+        "description",
+        "template",
+        "problems",
+    )
+    list_display = ("key", "name", "common_name", "info")
     form = LanguageForm
 
     def save_model(self, request, obj, form, change):
         super(LanguageAdmin, self).save_model(request, obj, form, change)
-        obj.problem_set.set(Problem.objects.exclude(id__in=form.cleaned_data['problems'].values('id')))
+        obj.problem_set.set(
+            Problem.objects.exclude(id__in=form.cleaned_data["problems"].values("id"))
+        )
 
     def get_form(self, request, obj=None, **kwargs):
-        self.form.base_fields['problems'].initial = \
-            Problem.objects.exclude(id__in=obj.problem_set.values('id')).values_list('pk', flat=True) if obj else []
+        self.form.base_fields["problems"].initial = (
+            Problem.objects.exclude(id__in=obj.problem_set.values("id")).values_list(
+                "pk", flat=True
+            )
+            if obj
+            else []
+        )
         form = super(LanguageAdmin, self).get_form(request, obj, **kwargs)
         if obj is not None:
-            form.base_fields['template'].widget = AceWidget(obj.ace, request.profile.ace_theme)
+            form.base_fields["template"].widget = AceWidget(
+                obj.ace, request.profile.ace_theme
+            )
         return form
 
 
 class GenerateKeyTextInput(TextInput):
     def render(self, name, value, attrs=None, renderer=None):
         text = super(TextInput, self).render(name, value, attrs)
-        return mark_safe(text + format_html(
-            '''\
+        return mark_safe(
+            text
+            + format_html(
+                """\
 <a href="#" onclick="return false;" class="button" id="id_{0}_regen">Regenerate</a>
 <script type="text/javascript">
 django.jQuery(document).ready(function ($) {{
@@ -65,37 +87,59 @@ django.jQuery(document).ready(function ($) {{
     }});
 }});
 </script>
-''', name))
+""",
+                name,
+            )
+        )
 
 
 class JudgeAdminForm(ModelForm):
     class Meta:
-        widgets = {'auth_key': GenerateKeyTextInput}
+        widgets = {"auth_key": GenerateKeyTextInput}
         if AdminPagedownWidget is not None:
-            widgets['description'] = AdminPagedownWidget
+            widgets["description"] = AdminPagedownWidget
 
 
 class JudgeAdmin(VersionAdmin):
     form = JudgeAdminForm
-    readonly_fields = ('created', 'online', 'start_time', 'ping', 'load', 'last_ip', 'runtimes', 'problems')
-    fieldsets = (
-        (None, {'fields': ('name', 'auth_key', 'is_blocked')}),
-        (_('Description'), {'fields': ('description',)}),
-        (_('Information'), {'fields': ('created', 'online', 'last_ip', 'start_time', 'ping', 'load')}),
-        (_('Capabilities'), {'fields': ('runtimes', 'problems')}),
+    readonly_fields = (
+        "created",
+        "online",
+        "start_time",
+        "ping",
+        "load",
+        "last_ip",
+        "runtimes",
+        "problems",
     )
-    list_display = ('name', 'online', 'start_time', 'ping', 'load', 'last_ip')
-    ordering = ['-online', 'name']
+    fieldsets = (
+        (None, {"fields": ("name", "auth_key", "is_blocked")}),
+        (_("Description"), {"fields": ("description",)}),
+        (
+            _("Information"),
+            {"fields": ("created", "online", "last_ip", "start_time", "ping", "load")},
+        ),
+        (_("Capabilities"), {"fields": ("runtimes", "problems")}),
+    )
+    list_display = ("name", "online", "start_time", "ping", "load", "last_ip")
+    ordering = ["-online", "name"]
 
     def get_urls(self):
-        return ([url(r'^(\d+)/disconnect/$', self.disconnect_view, name='judge_judge_disconnect'),
-                 url(r'^(\d+)/terminate/$', self.terminate_view, name='judge_judge_terminate')] +
-                super(JudgeAdmin, self).get_urls())
+        return [
+            url(
+                r"^(\d+)/disconnect/$",
+                self.disconnect_view,
+                name="judge_judge_disconnect",
+            ),
+            url(
+                r"^(\d+)/terminate/$", self.terminate_view, name="judge_judge_terminate"
+            ),
+        ] + super(JudgeAdmin, self).get_urls()
 
     def disconnect_judge(self, id, force=False):
         judge = get_object_or_404(Judge, id=id)
         judge.disconnect(force=force)
-        return HttpResponseRedirect(reverse('admin:judge_judge_changelist'))
+        return HttpResponseRedirect(reverse("admin:judge_judge_changelist"))
 
     def disconnect_view(self, request, id):
         return self.disconnect_judge(id)
@@ -105,7 +149,7 @@ class JudgeAdmin(VersionAdmin):
 
     def get_readonly_fields(self, request, obj=None):
         if obj is not None and obj.online:
-            return self.readonly_fields + ('name',)
+            return self.readonly_fields + ("name",)
         return self.readonly_fields
 
     def has_delete_permission(self, request, obj=None):
@@ -116,5 +160,5 @@ class JudgeAdmin(VersionAdmin):
 
     if AdminPagedownWidget is not None:
         formfield_overrides = {
-            TextField: {'widget': AdminPagedownWidget},
+            TextField: {"widget": AdminPagedownWidget},
         }

judge/admin/submission.py

@@ -13,239 +13,367 @@ from django.utils.html import format_html
 from django.utils.translation import gettext, gettext_lazy as _, pgettext, ungettext
 
 from django_ace import AceWidget
-from judge.models import ContestParticipation, ContestProblem, ContestSubmission, Profile, Submission, \
-    SubmissionSource, SubmissionTestCase
+from judge.models import (
+    ContestParticipation,
+    ContestProblem,
+    ContestSubmission,
+    Profile,
+    Submission,
+    SubmissionSource,
+    SubmissionTestCase,
+)
 from judge.utils.raw_sql import use_straight_join
 
 
 class SubmissionStatusFilter(admin.SimpleListFilter):
-    parameter_name = title = 'status'
-    __lookups = (('None', _('None')), ('NotDone', _('Not done')), ('EX', _('Exceptional'))) + Submission.STATUS
+    parameter_name = title = "status"
+    __lookups = (
+        ("None", _("None")),
+        ("NotDone", _("Not done")),
+        ("EX", _("Exceptional")),
+    ) + Submission.STATUS
     __handles = set(map(itemgetter(0), Submission.STATUS))
 
     def lookups(self, request, model_admin):
         return self.__lookups
 
     def queryset(self, request, queryset):
-        if self.value() == 'None':
+        if self.value() == "None":
             return queryset.filter(status=None)
-        elif self.value() == 'NotDone':
-            return queryset.exclude(status__in=['D', 'IE', 'CE', 'AB'])
-        elif self.value() == 'EX':
-            return queryset.exclude(status__in=['D', 'CE', 'G', 'AB'])
+        elif self.value() == "NotDone":
+            return queryset.exclude(status__in=["D", "IE", "CE", "AB"])
+        elif self.value() == "EX":
+            return queryset.exclude(status__in=["D", "CE", "G", "AB"])
         elif self.value() in self.__handles:
             return queryset.filter(status=self.value())
 
 
 class SubmissionResultFilter(admin.SimpleListFilter):
-    parameter_name = title = 'result'
-    __lookups = (('None', _('None')), ('BAD', _('Unaccepted'))) + Submission.RESULT
+    parameter_name = title = "result"
+    __lookups = (("None", _("None")), ("BAD", _("Unaccepted"))) + Submission.RESULT
     __handles = set(map(itemgetter(0), Submission.RESULT))
 
     def lookups(self, request, model_admin):
         return self.__lookups
 
     def queryset(self, request, queryset):
-        if self.value() == 'None':
+        if self.value() == "None":
             return queryset.filter(result=None)
-        elif self.value() == 'BAD':
-            return queryset.exclude(result='AC')
+        elif self.value() == "BAD":
+            return queryset.exclude(result="AC")
         elif self.value() in self.__handles:
             return queryset.filter(result=self.value())
 
 
 class SubmissionTestCaseInline(admin.TabularInline):
-    fields = ('case', 'batch', 'status', 'time', 'memory', 'points', 'total')
-    readonly_fields = ('case', 'batch', 'total')
+    fields = ("case", "batch", "status", "time", "memory", "points", "total")
+    readonly_fields = ("case", "batch", "total")
     model = SubmissionTestCase
     can_delete = False
     max_num = 0
 
 
 class ContestSubmissionInline(admin.StackedInline):
-    fields = ('problem', 'participation', 'points')
+    fields = ("problem", "participation", "points")
     model = ContestSubmission
 
     def get_formset(self, request, obj=None, **kwargs):
-        kwargs['formfield_callback'] = partial(self.formfield_for_dbfield, request=request, obj=obj)
+        kwargs["formfield_callback"] = partial(
+            self.formfield_for_dbfield, request=request, obj=obj
+        )
         return super(ContestSubmissionInline, self).get_formset(request, obj, **kwargs)
 
     def formfield_for_dbfield(self, db_field, **kwargs):
-        submission = kwargs.pop('obj', None)
+        submission = kwargs.pop("obj", None)
         label = None
         if submission:
-            if db_field.name == 'participation':
-                kwargs['queryset'] = ContestParticipation.objects.filter(user=submission.user,
-                                                                         contest__problems=submission.problem) \
-                    .only('id', 'contest__name')
+            if db_field.name == "participation":
+                kwargs["queryset"] = ContestParticipation.objects.filter(
+                    user=submission.user, contest__problems=submission.problem
+                ).only("id", "contest__name")
 
                 def label(obj):
                     return obj.contest.name
-            elif db_field.name == 'problem':
-                kwargs['queryset'] = ContestProblem.objects.filter(problem=submission.problem) \
-                    .only('id', 'problem__name', 'contest__name')
+
+            elif db_field.name == "problem":
+                kwargs["queryset"] = ContestProblem.objects.filter(
+                    problem=submission.problem
+                ).only("id", "problem__name", "contest__name")
 
                 def label(obj):
-                    return pgettext('contest problem', '%(problem)s in %(contest)s') % {
-                        'problem': obj.problem.name, 'contest': obj.contest.name,
+                    return pgettext("contest problem", "%(problem)s in %(contest)s") % {
+                        "problem": obj.problem.name,
+                        "contest": obj.contest.name,
                     }
-        field = super(ContestSubmissionInline, self).formfield_for_dbfield(db_field, **kwargs)
+
+        field = super(ContestSubmissionInline, self).formfield_for_dbfield(
+            db_field, **kwargs
+        )
         if label is not None:
             field.label_from_instance = label
         return field
 
 
 class SubmissionSourceInline(admin.StackedInline):
-    fields = ('source',)
+    fields = ("source",)
     model = SubmissionSource
     can_delete = False
     extra = 0
 
     def get_formset(self, request, obj=None, **kwargs):
-        kwargs.setdefault('widgets', {})['source'] = AceWidget(mode=obj and obj.language.ace,
-                                                               theme=request.profile.ace_theme)
+        kwargs.setdefault("widgets", {})["source"] = AceWidget(
+            mode=obj and obj.language.ace, theme=request.profile.ace_theme
+        )
         return super().get_formset(request, obj, **kwargs)
 
 
 class SubmissionAdmin(admin.ModelAdmin):
-    readonly_fields = ('user', 'problem', 'date', 'judged_date')
-    fields = ('user', 'problem', 'date', 'judged_date', 'time', 'memory', 'points', 'language', 'status', 'result',
-              'case_points', 'case_total', 'judged_on', 'error')
-    actions = ('judge', 'recalculate_score')
-    list_display = ('id', 'problem_code', 'problem_name', 'user_column', 'execution_time', 'pretty_memory',
-                    'points', 'language_column', 'status', 'result', 'judge_column')
-    list_filter = ('language', SubmissionStatusFilter, SubmissionResultFilter)
-    search_fields = ('problem__code', 'problem__name', 'user__user__username')
+    readonly_fields = ("user", "problem", "date", "judged_date")
+    fields = (
+        "user",
+        "problem",
+        "date",
+        "judged_date",
+        "time",
+        "memory",
+        "points",
+        "language",
+        "status",
+        "result",
+        "case_points",
+        "case_total",
+        "judged_on",
+        "error",
+    )
+    actions = ("judge", "recalculate_score")
+    list_display = (
+        "id",
+        "problem_code",
+        "problem_name",
+        "user_column",
+        "execution_time",
+        "pretty_memory",
+        "points",
+        "language_column",
+        "status",
+        "result",
+        "judge_column",
+    )
+    list_filter = ("language", SubmissionStatusFilter, SubmissionResultFilter)
+    search_fields = ("problem__code", "problem__name", "user__user__username")
     actions_on_top = True
     actions_on_bottom = True
-    inlines = [SubmissionSourceInline, SubmissionTestCaseInline, ContestSubmissionInline]
+    inlines = [
+        SubmissionSourceInline,
+        SubmissionTestCaseInline,
+        ContestSubmissionInline,
+    ]
 
     def get_queryset(self, request):
-        queryset = Submission.objects.select_related('problem', 'user__user', 'language').only(
-            'problem__code', 'problem__name', 'user__user__username', 'language__name',
-            'time', 'memory', 'points', 'status', 'result',
+        queryset = Submission.objects.select_related(
+            "problem", "user__user", "language"
+        ).only(
+            "problem__code",
+            "problem__name",
+            "user__user__username",
+            "language__name",
+            "time",
+            "memory",
+            "points",
+            "status",
+            "result",
         )
         use_straight_join(queryset)
-        if not request.user.has_perm('judge.edit_all_problem'):
+        if not request.user.has_perm("judge.edit_all_problem"):
             id = request.profile.id
-            queryset = queryset.filter(Q(problem__authors__id=id) | Q(problem__curators__id=id)).distinct()
+            queryset = queryset.filter(
+                Q(problem__authors__id=id) | Q(problem__curators__id=id)
+            ).distinct()
         return queryset
 
     def has_add_permission(self, request):
         return False
 
     def has_change_permission(self, request, obj=None):
-        if not request.user.has_perm('judge.edit_own_problem'):
+        if not request.user.has_perm("judge.edit_own_problem"):
             return False
-        if request.user.has_perm('judge.edit_all_problem') or obj is None:
+        if request.user.has_perm("judge.edit_all_problem") or obj is None:
             return True
         return obj.problem.is_editor(request.profile)
 
     def lookup_allowed(self, key, value):
-        return super(SubmissionAdmin, self).lookup_allowed(key, value) or key in ('problem__code',)
+        return super(SubmissionAdmin, self).lookup_allowed(key, value) or key in (
+            "problem__code",
+        )
 
     def judge(self, request, queryset):
-        if not request.user.has_perm('judge.rejudge_submission') or not request.user.has_perm('judge.edit_own_problem'):
-            self.message_user(request, gettext('You do not have the permission to rejudge submissions.'),
-                              level=messages.ERROR)
+        if not request.user.has_perm(
+            "judge.rejudge_submission"
+        ) or not request.user.has_perm("judge.edit_own_problem"):
+            self.message_user(
+                request,
+                gettext("You do not have the permission to rejudge submissions."),
+                level=messages.ERROR,
+            )
             return
-        queryset = queryset.order_by('id')
-        if not request.user.has_perm('judge.rejudge_submission_lot') and \
-                queryset.count() > settings.DMOJ_SUBMISSIONS_REJUDGE_LIMIT:
-            self.message_user(request, gettext('You do not have the permission to rejudge THAT many submissions.'),
-                              level=messages.ERROR)
+        queryset = queryset.order_by("id")
+        if (
+            not request.user.has_perm("judge.rejudge_submission_lot")
+            and queryset.count() > settings.DMOJ_SUBMISSIONS_REJUDGE_LIMIT
+        ):
+            self.message_user(
+                request,
+                gettext(
+                    "You do not have the permission to rejudge THAT many submissions."
+                ),
+                level=messages.ERROR,
+            )
             return
-        if not request.user.has_perm('judge.edit_all_problem'):
+        if not request.user.has_perm("judge.edit_all_problem"):
             id = request.profile.id
-            queryset = queryset.filter(Q(problem__authors__id=id) | Q(problem__curators__id=id))
+            queryset = queryset.filter(
+                Q(problem__authors__id=id) | Q(problem__curators__id=id)
+            )
         judged = len(queryset)
         for model in queryset:
             model.judge(rejudge=True, batch_rejudge=True)
-        self.message_user(request, ungettext('%d submission was successfully scheduled for rejudging.',
-                                             '%d submissions were successfully scheduled for rejudging.',
-                                             judged) % judged)
-    judge.short_description = _('Rejudge the selected submissions')
+        self.message_user(
+            request,
+            ungettext(
+                "%d submission was successfully scheduled for rejudging.",
+                "%d submissions were successfully scheduled for rejudging.",
+                judged,
+            )
+            % judged,
+        )
+
+    judge.short_description = _("Rejudge the selected submissions")
 
     def recalculate_score(self, request, queryset):
-        if not request.user.has_perm('judge.rejudge_submission'):
-            self.message_user(request, gettext('You do not have the permission to rejudge submissions.'),
-                              level=messages.ERROR)
+        if not request.user.has_perm("judge.rejudge_submission"):
+            self.message_user(
+                request,
+                gettext("You do not have the permission to rejudge submissions."),
+                level=messages.ERROR,
+            )
             return
-        submissions = list(queryset.defer(None).select_related(None).select_related('problem')
-                           .only('points', 'case_points', 'case_total', 'problem__partial', 'problem__points'))
+        submissions = list(
+            queryset.defer(None)
+            .select_related(None)
+            .select_related("problem")
+            .only(
+                "points",
+                "case_points",
+                "case_total",
+                "problem__partial",
+                "problem__points",
+            )
+        )
         for submission in submissions:
-            submission.points = round(submission.case_points / submission.case_total * submission.problem.points
-                                      if submission.case_total else 0, 1)
-            if not submission.problem.partial and submission.points < submission.problem.points:
+            submission.points = round(
+                submission.case_points
+                / submission.case_total
+                * submission.problem.points
+                if submission.case_total
+                else 0,
+                1,
+            )
+            if (
+                not submission.problem.partial
+                and submission.points < submission.problem.points
+            ):
                 submission.points = 0
             submission.save()
             submission.update_contest()
 
-        for profile in Profile.objects.filter(id__in=queryset.values_list('user_id', flat=True).distinct()):
+        for profile in Profile.objects.filter(
+            id__in=queryset.values_list("user_id", flat=True).distinct()
+        ):
             profile.calculate_points()
-            cache.delete('user_complete:%d' % profile.id)
-            cache.delete('user_attempted:%d' % profile.id)
+            cache.delete("user_complete:%d" % profile.id)
+            cache.delete("user_attempted:%d" % profile.id)
 
         for participation in ContestParticipation.objects.filter(
-                id__in=queryset.values_list('contest__participation_id')).prefetch_related('contest'):
+            id__in=queryset.values_list("contest__participation_id")
+        ).prefetch_related("contest"):
             participation.recompute_results()
 
-        self.message_user(request, ungettext('%d submission were successfully rescored.',
-                                             '%d submissions were successfully rescored.',
-                                             len(submissions)) % len(submissions))
-    recalculate_score.short_description = _('Rescore the selected submissions')
+        self.message_user(
+            request,
+            ungettext(
+                "%d submission were successfully rescored.",
+                "%d submissions were successfully rescored.",
+                len(submissions),
+            )
+            % len(submissions),
+        )
+
+    recalculate_score.short_description = _("Rescore the selected submissions")
 
     def problem_code(self, obj):
         return obj.problem.code
-    problem_code.short_description = _('Problem code')
-    problem_code.admin_order_field = 'problem__code'
+
+    problem_code.short_description = _("Problem code")
+    problem_code.admin_order_field = "problem__code"
 
     def problem_name(self, obj):
         return obj.problem.name
-    problem_name.short_description = _('Problem name')
-    problem_name.admin_order_field = 'problem__name'
+
+    problem_name.short_description = _("Problem name")
+    problem_name.admin_order_field = "problem__name"
 
     def user_column(self, obj):
         return obj.user.user.username
-    user_column.admin_order_field = 'user__user__username'
-    user_column.short_description = _('User')
+
+    user_column.admin_order_field = "user__user__username"
+    user_column.short_description = _("User")
 
     def execution_time(self, obj):
-        return round(obj.time, 2) if obj.time is not None else 'None'
-    execution_time.short_description = _('Time')
-    execution_time.admin_order_field = 'time'
+        return round(obj.time, 2) if obj.time is not None else "None"
+
+    execution_time.short_description = _("Time")
+    execution_time.admin_order_field = "time"
 
     def pretty_memory(self, obj):
         memory = obj.memory
         if memory is None:
-            return gettext('None')
+            return gettext("None")
         if memory < 1000:
-            return gettext('%d KB') % memory
+            return gettext("%d KB") % memory
         else:
-            return gettext('%.2f MB') % (memory / 1024)
-    pretty_memory.admin_order_field = 'memory'
-    pretty_memory.short_description = _('Memory')
+            return gettext("%.2f MB") % (memory / 1024)
+
+    pretty_memory.admin_order_field = "memory"
+    pretty_memory.short_description = _("Memory")
 
     def language_column(self, obj):
         return obj.language.name
-    language_column.admin_order_field = 'language__name'
-    language_column.short_description = _('Language')
+
+    language_column.admin_order_field = "language__name"
+    language_column.short_description = _("Language")
 
     def judge_column(self, obj):
-        return format_html('<input type="button" value="Rejudge" onclick="location.href=\'{}/judge/\'" />', obj.id)
-    judge_column.short_description = ''
+        return format_html(
+            '<input type="button" value="Rejudge" onclick="location.href=\'{}/judge/\'" />',
+            obj.id,
+        )
+
+    judge_column.short_description = ""
 
     def get_urls(self):
         return [
-            url(r'^(\d+)/judge/$', self.judge_view, name='judge_submission_rejudge'),
+            url(r"^(\d+)/judge/$", self.judge_view, name="judge_submission_rejudge"),
         ] + super(SubmissionAdmin, self).get_urls()
 
     def judge_view(self, request, id):
-        if not request.user.has_perm('judge.rejudge_submission') or not request.user.has_perm('judge.edit_own_problem'):
+        if not request.user.has_perm(
+            "judge.rejudge_submission"
+        ) or not request.user.has_perm("judge.edit_own_problem"):
             raise PermissionDenied()
         submission = get_object_or_404(Submission, id=id)
-        if not request.user.has_perm('judge.edit_all_problem') and \
-                not submission.problem.is_editor(request.profile):
+        if not request.user.has_perm(
+            "judge.edit_all_problem"
+        ) and not submission.problem.is_editor(request.profile):
             raise PermissionDenied()
         submission.judge(rejudge=True)
-        return HttpResponseRedirect(request.META.get('HTTP_REFERER', '/'))
+        return HttpResponseRedirect(request.META.get("HTTP_REFERER", "/"))

judge/admin/taxon.py

@@ -8,45 +8,51 @@ from judge.widgets import AdminHeavySelect2MultipleWidget
 
 class ProblemGroupForm(ModelForm):
     problems = ModelMultipleChoiceField(
-        label=_('Included problems'),
+        label=_("Included problems"),
         queryset=Problem.objects.all(),
         required=False,
-        help_text=_('These problems are included in this group of problems'),
-        widget=AdminHeavySelect2MultipleWidget(data_view='problem_select2'))
+        help_text=_("These problems are included in this group of problems"),
+        widget=AdminHeavySelect2MultipleWidget(data_view="problem_select2"),
+    )
 
 
 class ProblemGroupAdmin(admin.ModelAdmin):
-    fields = ('name', 'full_name', 'problems')
+    fields = ("name", "full_name", "problems")
     form = ProblemGroupForm
 
     def save_model(self, request, obj, form, change):
         super(ProblemGroupAdmin, self).save_model(request, obj, form, change)
-        obj.problem_set.set(form.cleaned_data['problems'])
+        obj.problem_set.set(form.cleaned_data["problems"])
         obj.save()
 
     def get_form(self, request, obj=None, **kwargs):
-        self.form.base_fields['problems'].initial = [o.pk for o in obj.problem_set.all()] if obj else []
+        self.form.base_fields["problems"].initial = (
+            [o.pk for o in obj.problem_set.all()] if obj else []
+        )
         return super(ProblemGroupAdmin, self).get_form(request, obj, **kwargs)
 
 
 class ProblemTypeForm(ModelForm):
     problems = ModelMultipleChoiceField(
-        label=_('Included problems'),
+        label=_("Included problems"),
         queryset=Problem.objects.all(),
         required=False,
-        help_text=_('These problems are included in this type of problems'),
-        widget=AdminHeavySelect2MultipleWidget(data_view='problem_select2'))
+        help_text=_("These problems are included in this type of problems"),
+        widget=AdminHeavySelect2MultipleWidget(data_view="problem_select2"),
+    )
 
 
 class ProblemTypeAdmin(admin.ModelAdmin):
-    fields = ('name', 'full_name', 'problems')
+    fields = ("name", "full_name", "problems")
     form = ProblemTypeForm
 
     def save_model(self, request, obj, form, change):
         super(ProblemTypeAdmin, self).save_model(request, obj, form, change)
-        obj.problem_set.set(form.cleaned_data['problems'])
+        obj.problem_set.set(form.cleaned_data["problems"])
         obj.save()
 
     def get_form(self, request, obj=None, **kwargs):
-        self.form.base_fields['problems'].initial = [o.pk for o in obj.problem_set.all()] if obj else []
+        self.form.base_fields["problems"].initial = (
+            [o.pk for o in obj.problem_set.all()] if obj else []
+        )
         return super(ProblemTypeAdmin, self).get_form(request, obj, **kwargs)

judge/admin/ticket.py

@@ -4,36 +4,56 @@ from django.forms import ModelForm
 from django.urls import reverse_lazy
 
 from judge.models import TicketMessage
-from judge.widgets import AdminHeavySelect2MultipleWidget, AdminHeavySelect2Widget, HeavyPreviewAdminPageDownWidget
+from judge.widgets import (
+    AdminHeavySelect2MultipleWidget,
+    AdminHeavySelect2Widget,
+    HeavyPreviewAdminPageDownWidget,
+)
 
 
 class TicketMessageForm(ModelForm):
     class Meta:
         widgets = {
-            'user': AdminHeavySelect2Widget(data_view='profile_select2', attrs={'style': 'width: 100%'}),
+            "user": AdminHeavySelect2Widget(
+                data_view="profile_select2", attrs={"style": "width: 100%"}
+            ),
         }
         if HeavyPreviewAdminPageDownWidget is not None:
-            widgets['body'] = HeavyPreviewAdminPageDownWidget(preview=reverse_lazy('ticket_preview'))
+            widgets["body"] = HeavyPreviewAdminPageDownWidget(
+                preview=reverse_lazy("ticket_preview")
+            )
 
 
 class TicketMessageInline(StackedInline):
     model = TicketMessage
     form = TicketMessageForm
-    fields = ('user', 'body')
+    fields = ("user", "body")
 
 
 class TicketForm(ModelForm):
     class Meta:
         widgets = {
-            'user': AdminHeavySelect2Widget(data_view='profile_select2', attrs={'style': 'width: 100%'}),
-            'assignees': AdminHeavySelect2MultipleWidget(data_view='profile_select2', attrs={'style': 'width: 100%'}),
+            "user": AdminHeavySelect2Widget(
+                data_view="profile_select2", attrs={"style": "width: 100%"}
+            ),
+            "assignees": AdminHeavySelect2MultipleWidget(
+                data_view="profile_select2", attrs={"style": "width: 100%"}
+            ),
         }
 
 
 class TicketAdmin(ModelAdmin):
-    fields = ('title', 'time', 'user', 'assignees', 'content_type', 'object_id', 'notes')
-    readonly_fields = ('time',)
-    list_display = ('title', 'user', 'time', 'linked_item')
+    fields = (
+        "title",
+        "time",
+        "user",
+        "assignees",
+        "content_type",
+        "object_id",
+        "notes",
+    )
+    readonly_fields = ("time",)
+    list_display = ("title", "user", "time", "linked_item")
     inlines = [TicketMessageInline]
     form = TicketForm
-    date_hierarchy = 'time'
+    date_hierarchy = "time"

judge/admin/volunteer.py

@@ -5,14 +5,30 @@ from django.utils.translation import gettext, gettext_lazy as _, ungettext
 
 from judge.models import VolunteerProblemVote
 
+
 class VolunteerProblemVoteAdmin(admin.ModelAdmin):
-    fields = ('voter', 'problem', 'time', 'thinking_points', 'knowledge_points', 'feedback')
-    readonly_fields = ('time', 'problem', 'voter')
-    list_display = ('voter', 'problem_link', 'time', 'thinking_points', 'knowledge_points', 'feedback')
-    date_hierarchy = 'time'
+    fields = (
+        "voter",
+        "problem",
+        "time",
+        "thinking_points",
+        "knowledge_points",
+        "feedback",
+    )
+    readonly_fields = ("time", "problem", "voter")
+    list_display = (
+        "voter",
+        "problem_link",
+        "time",
+        "thinking_points",
+        "knowledge_points",
+        "feedback",
+    )
+    date_hierarchy = "time"
 
     def problem_link(self, obj):
-        url = reverse('admin:judge_problem_change', args=(obj.problem.id,))
+        url = reverse("admin:judge_problem_change", args=(obj.problem.id,))
         return format_html(f"<a href='{url}'>{obj.problem.code}</a>")
-    problem_link.short_description = _('Problem')
-    problem_link.admin_order_field = 'problem__code'
+
+    problem_link.short_description = _("Problem")
+    problem_link.admin_order_field = "problem__code"

judge/apps.py

@@ -4,8 +4,8 @@ from django.utils.translation import gettext_lazy
 
 
 class JudgeAppConfig(AppConfig):
-    name = 'judge'
-    verbose_name = gettext_lazy('Online Judge')
+    name = "judge"
+    verbose_name = gettext_lazy("Online Judge")
 
     def ready(self):
         # WARNING: AS THIS IS NOT A FUNCTIONAL PROGRAMMING LANGUAGE,

judge/bridge/base_handler.py

@@ -8,9 +8,9 @@ from netaddr import IPGlob, IPSet
 
 from judge.utils.unicode import utf8text
 
-logger = logging.getLogger('judge.bridge')
+logger = logging.getLogger("judge.bridge")
 
-size_pack = struct.Struct('!I')
+size_pack = struct.Struct("!I")
 assert size_pack.size == 4
 
 MAX_ALLOWED_PACKET_SIZE = 8 * 1024 * 1024
@@ -20,7 +20,7 @@ def proxy_list(human_readable):
     globs = []
     addrs = []
     for item in human_readable:
-        if '*' in item or '-' in item:
+        if "*" in item or "-" in item:
             globs.append(IPGlob(item))
         else:
             addrs.append(item)
@@ -43,7 +43,7 @@ class RequestHandlerMeta(type):
         try:
             handler.handle()
         except BaseException:
-            logger.exception('Error in base packet handling')
+            logger.exception("Error in base packet handling")
             raise
         finally:
             handler.on_disconnect()
@@ -70,8 +70,12 @@ class ZlibPacketHandler(metaclass=RequestHandlerMeta):
 
     def read_sized_packet(self, size, initial=None):
         if size > MAX_ALLOWED_PACKET_SIZE:
-            logger.log(logging.WARNING if self._got_packet else logging.INFO,
-                       'Disconnecting client due to too-large message size (%d bytes): %s', size, self.client_address)
+            logger.log(
+                logging.WARNING if self._got_packet else logging.INFO,
+                "Disconnecting client due to too-large message size (%d bytes): %s",
+                size,
+                self.client_address,
+            )
             raise Disconnect()
 
         buffer = []
@@ -86,7 +90,7 @@ class ZlibPacketHandler(metaclass=RequestHandlerMeta):
             data = self.request.recv(remainder)
             remainder -= len(data)
             buffer.append(data)
-        self._on_packet(b''.join(buffer))
+        self._on_packet(b"".join(buffer))
 
     def parse_proxy_protocol(self, line):
         words = line.split()
@@ -94,18 +98,18 @@ class ZlibPacketHandler(metaclass=RequestHandlerMeta):
         if len(words) < 2:
             raise Disconnect()
 
-        if words[1] == b'TCP4':
+        if words[1] == b"TCP4":
             if len(words) != 6:
                 raise Disconnect()
             self.client_address = (utf8text(words[2]), utf8text(words[4]))
             self.server_address = (utf8text(words[3]), utf8text(words[5]))
-        elif words[1] == b'TCP6':
+        elif words[1] == b"TCP6":
             self.client_address = (utf8text(words[2]), utf8text(words[4]), 0, 0)
             self.server_address = (utf8text(words[3]), utf8text(words[5]), 0, 0)
-        elif words[1] != b'UNKNOWN':
+        elif words[1] != b"UNKNOWN":
             raise Disconnect()
 
-    def read_size(self, buffer=b''):
+    def read_size(self, buffer=b""):
         while len(buffer) < size_pack.size:
             recv = self.request.recv(size_pack.size - len(buffer))
             if not recv:
@@ -113,9 +117,9 @@ class ZlibPacketHandler(metaclass=RequestHandlerMeta):
             buffer += recv
         return size_pack.unpack(buffer)[0]
 
-    def read_proxy_header(self, buffer=b''):
+    def read_proxy_header(self, buffer=b""):
         # Max line length for PROXY protocol is 107, and we received 4 already.
-        while b'\r\n' not in buffer:
+        while b"\r\n" not in buffer:
             if len(buffer) > 107:
                 raise Disconnect()
             data = self.request.recv(107)
@@ -125,7 +129,7 @@ class ZlibPacketHandler(metaclass=RequestHandlerMeta):
         return buffer
 
     def _on_packet(self, data):
-        decompressed = zlib.decompress(data).decode('utf-8')
+        decompressed = zlib.decompress(data).decode("utf-8")
         self._got_packet = True
         self.on_packet(decompressed)
 
@@ -145,8 +149,10 @@ class ZlibPacketHandler(metaclass=RequestHandlerMeta):
         try:
             tag = self.read_size()
             self._initial_tag = size_pack.pack(tag)
-            if self.client_address[0] in self.proxies and self._initial_tag == b'PROX':
-                proxy, _, remainder = self.read_proxy_header(self._initial_tag).partition(b'\r\n')
+            if self.client_address[0] in self.proxies and self._initial_tag == b"PROX":
+                proxy, _, remainder = self.read_proxy_header(
+                    self._initial_tag
+                ).partition(b"\r\n")
                 self.parse_proxy_protocol(proxy)
 
                 while remainder:
@@ -171,25 +177,36 @@ class ZlibPacketHandler(metaclass=RequestHandlerMeta):
             return
         except zlib.error:
             if self._got_packet:
-                logger.warning('Encountered zlib error during packet handling, disconnecting client: %s',
-                               self.client_address, exc_info=True)
+                logger.warning(
+                    "Encountered zlib error during packet handling, disconnecting client: %s",
+                    self.client_address,
+                    exc_info=True,
+                )
             else:
-                logger.info('Potentially wrong protocol (zlib error): %s: %r', self.client_address, self._initial_tag,
-                            exc_info=True)
+                logger.info(
+                    "Potentially wrong protocol (zlib error): %s: %r",
+                    self.client_address,
+                    self._initial_tag,
+                    exc_info=True,
+                )
         except socket.timeout:
             if self._got_packet:
-                logger.info('Socket timed out: %s', self.client_address)
+                logger.info("Socket timed out: %s", self.client_address)
                 self.on_timeout()
             else:
-                logger.info('Potentially wrong protocol: %s: %r', self.client_address, self._initial_tag)
+                logger.info(
+                    "Potentially wrong protocol: %s: %r",
+                    self.client_address,
+                    self._initial_tag,
+                )
         except socket.error as e:
             # When a gevent socket is shutdown, gevent cancels all waits, causing recv to raise cancel_wait_ex.
-            if e.__class__.__name__ == 'cancel_wait_ex':
+            if e.__class__.__name__ == "cancel_wait_ex":
                 return
             raise
 
     def send(self, data):
-        compressed = zlib.compress(data.encode('utf-8'))
+        compressed = zlib.compress(data.encode("utf-8"))
         self.request.sendall(size_pack.pack(len(compressed)) + compressed)
 
     def close(self):

judge/bridge/daemon.py

@@ -11,7 +11,7 @@ from judge.bridge.judge_list import JudgeList
 from judge.bridge.server import Server
 from judge.models import Judge, Submission
 
-logger = logging.getLogger('judge.bridge')
+logger = logging.getLogger("judge.bridge")
 
 
 def reset_judges():
@@ -20,12 +20,17 @@ def reset_judges():
 
 def judge_daemon():
     reset_judges()
-    Submission.objects.filter(status__in=Submission.IN_PROGRESS_GRADING_STATUS) \
-        .update(status='IE', result='IE', error=None)
+    Submission.objects.filter(status__in=Submission.IN_PROGRESS_GRADING_STATUS).update(
+        status="IE", result="IE", error=None
+    )
     judges = JudgeList()
 
-    judge_server = Server(settings.BRIDGED_JUDGE_ADDRESS, partial(JudgeHandler, judges=judges))
-    django_server = Server(settings.BRIDGED_DJANGO_ADDRESS, partial(DjangoHandler, judges=judges))
+    judge_server = Server(
+        settings.BRIDGED_JUDGE_ADDRESS, partial(JudgeHandler, judges=judges)
+    )
+    django_server = Server(
+        settings.BRIDGED_DJANGO_ADDRESS, partial(DjangoHandler, judges=judges)
+    )
 
     threading.Thread(target=django_server.serve_forever).start()
     threading.Thread(target=judge_server.serve_forever).start()
@@ -33,7 +38,7 @@ def judge_daemon():
     stop = threading.Event()
 
     def signal_handler(signum, _):
-        logger.info('Exiting due to %s', signal.Signals(signum).name)
+        logger.info("Exiting due to %s", signal.Signals(signum).name)
         stop.set()
 
     signal.signal(signal.SIGINT, signal_handler)

judge/bridge/django_handler.py

@@ -4,8 +4,8 @@ import struct
 
 from judge.bridge.base_handler import Disconnect, ZlibPacketHandler
 
-logger = logging.getLogger('judge.bridge')
-size_pack = struct.Struct('!I')
+logger = logging.getLogger("judge.bridge")
+size_pack = struct.Struct("!I")
 
 
 class DjangoHandler(ZlibPacketHandler):
@@ -13,47 +13,52 @@ class DjangoHandler(ZlibPacketHandler):
         super().__init__(request, client_address, server)
 
         self.handlers = {
-            'submission-request': self.on_submission,
-            'terminate-submission': self.on_termination,
-            'disconnect-judge': self.on_disconnect_request,
+            "submission-request": self.on_submission,
+            "terminate-submission": self.on_termination,
+            "disconnect-judge": self.on_disconnect_request,
         }
         self.judges = judges
 
     def send(self, data):
-        super().send(json.dumps(data, separators=(',', ':')))
+        super().send(json.dumps(data, separators=(",", ":")))
 
     def on_packet(self, packet):
         packet = json.loads(packet)
         try:
-            result = self.handlers.get(packet.get('name', None), self.on_malformed)(packet)
+            result = self.handlers.get(packet.get("name", None), self.on_malformed)(
+                packet
+            )
         except Exception:
-            logger.exception('Error in packet handling (Django-facing)')
-            result = {'name': 'bad-request'}
+            logger.exception("Error in packet handling (Django-facing)")
+            result = {"name": "bad-request"}
         self.send(result)
         raise Disconnect()
 
     def on_submission(self, data):
-        id = data['submission-id']
-        problem = data['problem-id']
-        language = data['language']
-        source = data['source']
-        judge_id = data['judge-id']
-        priority = data['priority']
+        id = data["submission-id"]
+        problem = data["problem-id"]
+        language = data["language"]
+        source = data["source"]
+        judge_id = data["judge-id"]
+        priority = data["priority"]
         if not self.judges.check_priority(priority):
-            return {'name': 'bad-request'}
+            return {"name": "bad-request"}
         self.judges.judge(id, problem, language, source, judge_id, priority)
-        return {'name': 'submission-received', 'submission-id': id}
+        return {"name": "submission-received", "submission-id": id}
 
     def on_termination(self, data):
-        return {'name': 'submission-received', 'judge-aborted': self.judges.abort(data['submission-id'])}
+        return {
+            "name": "submission-received",
+            "judge-aborted": self.judges.abort(data["submission-id"]),
+        }
 
     def on_disconnect_request(self, data):
-        judge_id = data['judge-id']
-        force = data['force']
+        judge_id = data["judge-id"]
+        force = data["force"]
         self.judges.disconnect(judge_id, force=force)
 
     def on_malformed(self, packet):
-        logger.error('Malformed packet: %s', packet)
+        logger.error("Malformed packet: %s", packet)
 
     def on_close(self):
         self._to_kill = False

judge/bridge/echo_test_client.py

@@ -4,7 +4,7 @@ import struct
 import time
 import zlib
 
-size_pack = struct.Struct('!I')
+size_pack = struct.Struct("!I")
 
 
 def open_connection():
@@ -13,69 +13,70 @@ def open_connection():
 
 
 def zlibify(data):
-    data = zlib.compress(data.encode('utf-8'))
+    data = zlib.compress(data.encode("utf-8"))
     return size_pack.pack(len(data)) + data
 
 
 def dezlibify(data, skip_head=True):
     if skip_head:
         data = data[size_pack.size :]
-    return zlib.decompress(data).decode('utf-8')
+    return zlib.decompress(data).decode("utf-8")
 
 
 def main():
     global host, port
     import argparse
+
     parser = argparse.ArgumentParser()
-    parser.add_argument('-l', '--host', default='localhost')
-    parser.add_argument('-p', '--port', default=9999, type=int)
+    parser.add_argument("-l", "--host", default="localhost")
+    parser.add_argument("-p", "--port", default=9999, type=int)
     args = parser.parse_args()
     host, port = args.host, args.port
 
-    print('Opening idle connection:', end=' ')
+    print("Opening idle connection:", end=" ")
     s1 = open_connection()
-    print('Success')
-    print('Opening hello world connection:', end=' ')
+    print("Success")
+    print("Opening hello world connection:", end=" ")
     s2 = open_connection()
-    print('Success')
-    print('Sending Hello, World!', end=' ')
-    s2.sendall(zlibify('Hello, World!'))
-    print('Success')
-    print('Testing blank connection:', end=' ')
+    print("Success")
+    print("Sending Hello, World!", end=" ")
+    s2.sendall(zlibify("Hello, World!"))
+    print("Success")
+    print("Testing blank connection:", end=" ")
     s3 = open_connection()
     s3.close()
-    print('Success')
+    print("Success")
     result = dezlibify(s2.recv(1024))
-    assert result == 'Hello, World!'
+    assert result == "Hello, World!"
     print(result)
     s2.close()
-    print('Large random data test:', end=' ')
+    print("Large random data test:", end=" ")
     s4 = open_connection()
-    data = os.urandom(1000000).decode('iso-8859-1')
-    print('Generated', end=' ')
+    data = os.urandom(1000000).decode("iso-8859-1")
+    print("Generated", end=" ")
     s4.sendall(zlibify(data))
-    print('Sent', end=' ')
-    result = b''
+    print("Sent", end=" ")
+    result = b""
     while len(result) < size_pack.size:
         result += s4.recv(1024)
     size = size_pack.unpack(result[: size_pack.size])[0]
     result = result[size_pack.size :]
     while len(result) < size:
         result += s4.recv(1024)
-    print('Received', end=' ')
+    print("Received", end=" ")
     assert dezlibify(result, False) == data
-    print('Success')
+    print("Success")
     s4.close()
-    print('Test malformed connection:', end=' ')
+    print("Test malformed connection:", end=" ")
     s5 = open_connection()
-    s5.sendall(data[:100000].encode('utf-8'))
+    s5.sendall(data[:100000].encode("utf-8"))
     s5.close()
-    print('Success')
-    print('Waiting for timeout to close idle connection:', end=' ')
+    print("Success")
+    print("Waiting for timeout to close idle connection:", end=" ")
     time.sleep(6)
-    print('Done')
+    print("Done")
     s1.close()
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     main()

judge/bridge/echo_test_server.py

@@ -3,19 +3,22 @@ from judge.bridge.base_handler import ZlibPacketHandler
 
 class EchoPacketHandler(ZlibPacketHandler):
     def on_connect(self):
-        print('New client:', self.client_address)
+        print("New client:", self.client_address)
         self.timeout = 5
 
     def on_timeout(self):
-        print('Inactive client:', self.client_address)
+        print("Inactive client:", self.client_address)
 
     def on_packet(self, data):
         self.timeout = None
-        print('Data from %s: %r' % (self.client_address, data[:30] if len(data) > 30 else data))
+        print(
+            "Data from %s: %r"
+            % (self.client_address, data[:30] if len(data) > 30 else data)
+        )
         self.send(data)
 
     def on_disconnect(self):
-        print('Closed client:', self.client_address)
+        print("Closed client:", self.client_address)
 
 
 def main():
@@ -23,9 +26,9 @@ def main():
     from judge.bridge.server import Server
 
     parser = argparse.ArgumentParser()
-    parser.add_argument('-l', '--host', action='append')
-    parser.add_argument('-p', '--port', type=int, action='append')
-    parser.add_argument('-P', '--proxy', action='append')
+    parser.add_argument("-l", "--host", action="append")
+    parser.add_argument("-p", "--port", type=int, action="append")
+    parser.add_argument("-P", "--proxy", action="append")
     args = parser.parse_args()
 
     class Handler(EchoPacketHandler):
@@ -35,5 +38,5 @@ def main():
     server.serve_forever()
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     main()

judge/bridge/judge_list.py

@@ -8,9 +8,9 @@ try:
 except ImportError:
     from pyllist import dllist
 
-logger = logging.getLogger('judge.bridge')
+logger = logging.getLogger("judge.bridge")
 
-PriorityMarker = namedtuple('PriorityMarker', 'priority')
+PriorityMarker = namedtuple("PriorityMarker", "priority")
 
 
 class JudgeList(object):
@@ -18,7 +18,9 @@ class JudgeList(object):
 
     def __init__(self):
         self.queue = dllist()
-        self.priority = [self.queue.append(PriorityMarker(i)) for i in range(self.priorities)]
+        self.priority = [
+            self.queue.append(PriorityMarker(i)) for i in range(self.priorities)
+        ]
         self.judges = set()
         self.node_map = {}
         self.submission_map = {}
@@ -32,11 +34,19 @@ class JudgeList(object):
                     id, problem, language, source, judge_id = node.value
                     if judge.can_judge(problem, language, judge_id):
                         self.submission_map[id] = judge
-                        logger.info('Dispatched queued submission %d: %s', id, judge.name)
+                        logger.info(
+                            "Dispatched queued submission %d: %s", id, judge.name
+                        )
                         try:
                             judge.submit(id, problem, language, source)
                         except Exception:
-                            logger.exception('Failed to dispatch %d (%s, %s) to %s', id, problem, language, judge.name)
+                            logger.exception(
+                                "Failed to dispatch %d (%s, %s) to %s",
+                                id,
+                                problem,
+                                language,
+                                judge.name,
+                            )
                             self.judges.remove(judge)
                             return
                         self.queue.remove(node)
@@ -76,14 +86,14 @@ class JudgeList(object):
 
     def on_judge_free(self, judge, submission):
         with self.lock:
-            logger.info('Judge available after grading %d: %s', submission, judge.name)
+            logger.info("Judge available after grading %d: %s", submission, judge.name)
             del self.submission_map[submission]
             judge._working = False
             self._handle_free_judge(judge)
 
     def abort(self, submission):
         with self.lock:
-            logger.info('Abort request: %d', submission)
+            logger.info("Abort request: %d", submission)
             try:
                 self.submission_map[submission].abort()
                 return True
@@ -108,21 +118,33 @@ class JudgeList(object):
                 return
 
             candidates = [
-                judge for judge in self.judges if not judge.working and judge.can_judge(problem, language, judge_id)
+                judge
+                for judge in self.judges
+                if not judge.working and judge.can_judge(problem, language, judge_id)
             ]
             if judge_id:
-                logger.info('Specified judge %s is%savailable', judge_id, ' ' if candidates else ' not ')
+                logger.info(
+                    "Specified judge %s is%savailable",
+                    judge_id,
+                    " " if candidates else " not ",
+                )
             else:
-                logger.info('Free judges: %d', len(candidates))
+                logger.info("Free judges: %d", len(candidates))
             if candidates:
                 # Schedule the submission on the judge reporting least load.
-                judge = min(candidates, key=attrgetter('load'))
-                logger.info('Dispatched submission %d to: %s', id, judge.name)
+                judge = min(candidates, key=attrgetter("load"))
+                logger.info("Dispatched submission %d to: %s", id, judge.name)
                 self.submission_map[id] = judge
                 try:
                     judge.submit(id, problem, language, source)
                 except Exception:
-                    logger.exception('Failed to dispatch %d (%s, %s) to %s', id, problem, language, judge.name)
+                    logger.exception(
+                        "Failed to dispatch %d (%s, %s) to %s",
+                        id,
+                        problem,
+                        language,
+                        judge.name,
+                    )
                     self.judges.discard(judge)
                     return self.judge(id, problem, language, source, judge_id, priority)
             else:
@@ -130,4 +152,4 @@ class JudgeList(object):
                     (id, problem, language, source, judge_id),
                     self.priority[priority],
                 )
-                logger.info('Queued submission: %d', id)
+                logger.info("Queued submission: %d", id)

judge/bridge/server.py

@@ -12,7 +12,9 @@ class Server:
         self._shutdown = threading.Event()
 
     def serve_forever(self):
-        threads = [threading.Thread(target=server.serve_forever) for server in self.servers]
+        threads = [
+            threading.Thread(target=server.serve_forever) for server in self.servers
+        ]
         for thread in threads:
             thread.daemon = True
             thread.start()

judge/caching.py

@@ -2,9 +2,9 @@ from django.core.cache import cache
 
 
 def finished_submission(sub):
-    keys = ['user_complete:%d' % sub.user_id, 'user_attempted:%s' % sub.user_id]
-    if hasattr(sub, 'contest'):
+    keys = ["user_complete:%d" % sub.user_id, "user_attempted:%s" % sub.user_id]
+    if hasattr(sub, "contest"):
         participation = sub.contest.participation
-        keys += ['contest_complete:%d' % participation.id]
-        keys += ['contest_attempted:%d' % participation.id]
+        keys += ["contest_complete:%d" % participation.id]
+        keys += ["contest_attempted:%d" % participation.id]
     cache.delete_many(keys)

judge/comments.py

@@ -7,7 +7,11 @@ from django.db.models import Count
 from django.db.models.expressions import F, Value
 from django.db.models.functions import Coalesce
 from django.forms import ModelForm
-from django.http import HttpResponseForbidden, HttpResponseNotFound, HttpResponseRedirect
+from django.http import (
+    HttpResponseForbidden,
+    HttpResponseNotFound,
+    HttpResponseRedirect,
+)
 from django.urls import reverse_lazy
 from django.utils.decorators import method_decorator
 from django.utils.translation import gettext as _
@@ -24,50 +28,55 @@ from judge.widgets import HeavyPreviewPageDownWidget
 from judge.jinja2.reference import get_user_from_text
 
 
-
 def add_mention_notifications(comment):
     user_referred = get_user_from_text(comment.body).exclude(id=comment.author.id)
     for user in user_referred:
-        notification_ref = Notification(owner=user,
-                                        comment=comment,
-                                        category='Mention')
+        notification_ref = Notification(owner=user, comment=comment, category="Mention")
         notification_ref.save()
 
-def del_mention_notifications(comment):
-    query = {
-        'comment': comment,
-        'category': 'Mention'
-    }
-    Notification.objects.filter(**query).delete()
 
+def del_mention_notifications(comment):
+    query = {"comment": comment, "category": "Mention"}
+    Notification.objects.filter(**query).delete()
 
 
 class CommentForm(ModelForm):
     class Meta:
         model = Comment
-        fields = ['body', 'parent']
+        fields = ["body", "parent"]
         widgets = {
-            'parent': forms.HiddenInput(),
+            "parent": forms.HiddenInput(),
         }
 
         if HeavyPreviewPageDownWidget is not None:
-            widgets['body'] = HeavyPreviewPageDownWidget(preview=reverse_lazy('comment_preview'),
-                                                         preview_timeout=1000, hide_preview_button=True)
+            widgets["body"] = HeavyPreviewPageDownWidget(
+                preview=reverse_lazy("comment_preview"),
+                preview_timeout=1000,
+                hide_preview_button=True,
+            )
 
     def __init__(self, request, *args, **kwargs):
         self.request = request
         super(CommentForm, self).__init__(*args, **kwargs)
-        self.fields['body'].widget.attrs.update({'placeholder': _('Comment body')})
+        self.fields["body"].widget.attrs.update({"placeholder": _("Comment body")})
 
     def clean(self):
         if self.request is not None and self.request.user.is_authenticated:
             profile = self.request.profile
             if profile.mute:
-                raise ValidationError(_('Your part is silent, little toad.'))
-            elif (not self.request.user.is_staff and
-                  not profile.submission_set.filter(points=F('problem__points')).exists()):
-                raise ValidationError(_('You need to have solved at least one problem '
-                                        'before your voice can be heard.'))
+                raise ValidationError(_("Your part is silent, little toad."))
+            elif (
+                not self.request.user.is_staff
+                and not profile.submission_set.filter(
+                    points=F("problem__points")
+                ).exists()
+            ):
+                raise ValidationError(
+                    _(
+                        "You need to have solved at least one problem "
+                        "before your voice can be heard."
+                    )
+                )
         return super(CommentForm, self).clean()
 
 
@@ -80,10 +89,12 @@ class CommentedDetailView(TemplateResponseMixin, SingleObjectMixin, View):
         return self.comment_page
 
     def is_comment_locked(self):
-        if self.request.user.has_perm('judge.override_comment_lock'):
+        if self.request.user.has_perm("judge.override_comment_lock"):
             return False
-        return (CommentLock.objects.filter(page=self.get_comment_page()).exists()
-            or (self.request.in_contest and self.request.participation.contest.use_clarifications))
+        return CommentLock.objects.filter(page=self.get_comment_page()).exists() or (
+            self.request.in_contest
+            and self.request.participation.contest.use_clarifications
+        )
 
     @method_decorator(login_required)
     def post(self, request, *args, **kwargs):
@@ -93,14 +104,16 @@ class CommentedDetailView(TemplateResponseMixin, SingleObjectMixin, View):
         if self.is_comment_locked():
             return HttpResponseForbidden()
 
-        parent = request.POST.get('parent')
+        parent = request.POST.get("parent")
         if parent:
             try:
                 parent = int(parent)
             except ValueError:
                 return HttpResponseNotFound()
             else:
-                if not Comment.objects.filter(hidden=False, id=parent, page=page).exists():
+                if not Comment.objects.filter(
+                    hidden=False, id=parent, page=page
+                ).exists():
                     return HttpResponseNotFound()
 
         form = CommentForm(request, request.POST)
@@ -109,17 +122,18 @@ class CommentedDetailView(TemplateResponseMixin, SingleObjectMixin, View):
             comment.author = request.profile
             comment.page = page
 
-
-            with LockModel(write=(Comment, Revision, Version), read=(ContentType,)), revisions.create_revision():
+            with LockModel(
+                write=(Comment, Revision, Version), read=(ContentType,)
+            ), revisions.create_revision():
                 revisions.set_user(request.user)
-                revisions.set_comment(_('Posted comment'))
+                revisions.set_comment(_("Posted comment"))
                 comment.save()
 
             # add notification for reply
             if comment.parent and comment.parent.author != comment.author:
-                notification_rep = Notification(owner=comment.parent.author,
-                                            comment=comment,
-                                            category='Reply')
+                notification_rep = Notification(
+                    owner=comment.parent.author, comment=comment, category="Reply"
+                )
                 notification_rep.save()
 
             add_mention_notifications(comment)
@@ -131,25 +145,40 @@ class CommentedDetailView(TemplateResponseMixin, SingleObjectMixin, View):
 
     def get(self, request, *args, **kwargs):
         self.object = self.get_object()
-        return self.render_to_response(self.get_context_data(
+        return self.render_to_response(
+            self.get_context_data(
                 object=self.object,
-            comment_form=CommentForm(request, initial={'page': self.get_comment_page(), 'parent': None}),
-        ))
+                comment_form=CommentForm(
+                    request, initial={"page": self.get_comment_page(), "parent": None}
+                ),
+            )
+        )
 
     def get_context_data(self, **kwargs):
         context = super(CommentedDetailView, self).get_context_data(**kwargs)
         queryset = Comment.objects.filter(hidden=False, page=self.get_comment_page())
-        context['has_comments'] = queryset.exists()
-        context['comment_lock'] = self.is_comment_locked()
-        queryset = queryset.select_related('author__user').defer('author__about').annotate(revisions=Count('versions'))
+        context["has_comments"] = queryset.exists()
+        context["comment_lock"] = self.is_comment_locked()
+        queryset = (
+            queryset.select_related("author__user")
+            .defer("author__about")
+            .annotate(revisions=Count("versions"))
+        )
 
         if self.request.user.is_authenticated:
-            queryset = queryset.annotate(vote_score=Coalesce(RawSQLColumn(CommentVote, 'score'), Value(0)))
+            queryset = queryset.annotate(
+                vote_score=Coalesce(RawSQLColumn(CommentVote, "score"), Value(0))
+            )
             profile = self.request.profile
-            unique_together_left_join(queryset, CommentVote, 'comment', 'voter', profile.id)
-            context['is_new_user'] = (not self.request.user.is_staff and
-                                      not profile.submission_set.filter(points=F('problem__points')).exists())
-        context['comment_list'] = queryset
-        context['vote_hide_threshold'] = settings.DMOJ_COMMENT_VOTE_HIDE_THRESHOLD
+            unique_together_left_join(
+                queryset, CommentVote, "comment", "voter", profile.id
+            )
+            context["is_new_user"] = (
+                not self.request.user.is_staff
+                and not profile.submission_set.filter(
+                    points=F("problem__points")
+                ).exists()
+            )
+        context["comment_list"] = queryset
+        context["vote_hide_threshold"] = settings.DMOJ_COMMENT_VOTE_HIDE_THRESHOLD
         return context
-

judge/contest_format/atcoder.py

@@ -14,14 +14,14 @@ from judge.timezone import from_database_time
 from judge.utils.timedelta import nice_repr
 
 
-@register_contest_format('atcoder')
+@register_contest_format("atcoder")
 class AtCoderContestFormat(DefaultContestFormat):
-    name = gettext_lazy('AtCoder')
-    config_defaults = {'penalty': 5}
-    config_validators = {'penalty': lambda x: x >= 0}
-    '''
+    name = gettext_lazy("AtCoder")
+    config_defaults = {"penalty": 5}
+    config_validators = {"penalty": lambda x: x >= 0}
+    """
         penalty: Number of penalty minutes each incorrect submission adds. Defaults to 5.
-    '''
+    """
 
     @classmethod
     def validate(cls, config):
@@ -29,7 +29,9 @@ class AtCoderContestFormat(DefaultContestFormat):
             return
 
         if not isinstance(config, dict):
-            raise ValidationError('AtCoder-styled contest expects no config or dict as config')
+            raise ValidationError(
+                "AtCoder-styled contest expects no config or dict as config"
+            )
 
         for key, value in config.items():
             if key not in cls.config_defaults:
@@ -37,7 +39,9 @@ class AtCoderContestFormat(DefaultContestFormat):
             if not isinstance(value, type(cls.config_defaults[key])):
                 raise ValidationError('invalid type for config key "%s"' % key)
             if not cls.config_validators[key](value):
-                raise ValidationError('invalid value "%s" for config key "%s"' % (value, key))
+                raise ValidationError(
+                    'invalid value "%s" for config key "%s"' % (value, key)
+                )
 
     def __init__(self, contest, config):
         self.config = self.config_defaults.copy()
@@ -51,7 +55,8 @@ class AtCoderContestFormat(DefaultContestFormat):
         format_data = {}
 
         with connection.cursor() as cursor:
-            cursor.execute('''
+            cursor.execute(
+                """
                 SELECT MAX(cs.points) as `score`, (
                     SELECT MIN(csub.date)
                         FROM judge_contestsubmission ccs LEFT OUTER JOIN
@@ -62,21 +67,27 @@ class AtCoderContestFormat(DefaultContestFormat):
                      judge_contestsubmission cs ON (cs.problem_id = cp.id AND cs.participation_id = %s) LEFT OUTER JOIN
                      judge_submission sub ON (sub.id = cs.submission_id)
                 GROUP BY cp.id
-            ''', (participation.id, participation.id))
+            """,
+                (participation.id, participation.id),
+            )
 
             for score, time, prob in cursor.fetchall():
                 time = from_database_time(time)
                 dt = (time - participation.start).total_seconds()
 
                 # Compute penalty
-                if self.config['penalty']:
+                if self.config["penalty"]:
                     # An IE can have a submission result of `None`
-                    subs = participation.submissions.exclude(submission__result__isnull=True) \
-                                                    .exclude(submission__result__in=['IE', 'CE']) \
+                    subs = (
+                        participation.submissions.exclude(
+                            submission__result__isnull=True
+                        )
+                        .exclude(submission__result__in=["IE", "CE"])
                         .filter(problem_id=prob)
+                    )
                     if score:
                         prev = subs.filter(submission__date__lte=time).count() - 1
-                        penalty += prev * self.config['penalty'] * 60
+                        penalty += prev * self.config["penalty"] * 60
                     else:
                         # We should always display the penalty, even if the user has a score of 0
                         prev = subs.count()
@@ -86,7 +97,7 @@ class AtCoderContestFormat(DefaultContestFormat):
                 if score:
                     cumtime = max(cumtime, dt)
 
-                format_data[str(prob)] = {'time': dt, 'points': score, 'penalty': prev}
+                format_data[str(prob)] = {"time": dt, "points": score, "penalty": prev}
                 points += score
 
         participation.cumtime = cumtime + penalty
@@ -98,17 +109,38 @@ class AtCoderContestFormat(DefaultContestFormat):
     def display_user_problem(self, participation, contest_problem):
         format_data = (participation.format_data or {}).get(str(contest_problem.id))
         if format_data:
-            penalty = format_html('<small style="color:red"> ({penalty})</small>',
-                                  penalty=floatformat(format_data['penalty'])) if format_data['penalty'] else ''
+            penalty = (
+                format_html(
+                    '<small style="color:red"> ({penalty})</small>',
+                    penalty=floatformat(format_data["penalty"]),
+                )
+                if format_data["penalty"]
+                else ""
+            )
             return format_html(
                 '<td class="{state} problem-score-col"><a href="{url}">{points}{penalty}<div class="solving-time">{time}</div></a></td>',
-                state=(('pretest-' if self.contest.run_pretests_only and contest_problem.is_pretested else '') +
-                       self.best_solution_state(format_data['points'], contest_problem.points)),
-                url=reverse('contest_user_submissions',
-                            args=[self.contest.key, participation.user.user.username, contest_problem.problem.code]),
-                points=floatformat(format_data['points']),
+                state=(
+                    (
+                        "pretest-"
+                        if self.contest.run_pretests_only
+                        and contest_problem.is_pretested
+                        else ""
+                    )
+                    + self.best_solution_state(
+                        format_data["points"], contest_problem.points
+                    )
+                ),
+                url=reverse(
+                    "contest_user_submissions",
+                    args=[
+                        self.contest.key,
+                        participation.user.user.username,
+                        contest_problem.problem.code,
+                    ],
+                ),
+                points=floatformat(format_data["points"]),
                 penalty=penalty,
-                time=nice_repr(timedelta(seconds=format_data['time']), 'noday'),
+                time=nice_repr(timedelta(seconds=format_data["time"]), "noday"),
             )
         else:
             return mark_safe('<td class="problem-score-col"></td>')

judge/contest_format/base.py

@@ -93,7 +93,7 @@ class BaseContestFormat(six.with_metaclass(ABCMeta)):
     @classmethod
     def best_solution_state(cls, points, total):
         if not points:
-            return 'failed-score'
+            return "failed-score"
         if points == total:
-            return 'full-score'
-        return 'partial-score'
+            return "full-score"
+        return "partial-score"

judge/contest_format/default.py

@@ -13,14 +13,16 @@ from judge.contest_format.registry import register_contest_format
 from judge.utils.timedelta import nice_repr
 
 
-@register_contest_format('default')
+@register_contest_format("default")
 class DefaultContestFormat(BaseContestFormat):
-    name = gettext_lazy('Default')
+    name = gettext_lazy("Default")
 
     @classmethod
     def validate(cls, config):
         if config is not None and (not isinstance(config, dict) or config):
-            raise ValidationError('default contest expects no config or empty dict as config')
+            raise ValidationError(
+                "default contest expects no config or empty dict as config"
+            )
 
     def __init__(self, contest, config):
         super(DefaultContestFormat, self).__init__(contest, config)
@@ -30,14 +32,18 @@ class DefaultContestFormat(BaseContestFormat):
         points = 0
         format_data = {}
 
-        for result in participation.submissions.values('problem_id').annotate(
-                time=Max('submission__date'), points=Max('points'),
+        for result in participation.submissions.values("problem_id").annotate(
+            time=Max("submission__date"),
+            points=Max("points"),
         ):
-            dt = (result['time'] - participation.start).total_seconds()
-            if result['points']:
+            dt = (result["time"] - participation.start).total_seconds()
+            if result["points"]:
                 cumtime += dt
-            format_data[str(result['problem_id'])] = {'time': dt, 'points': result['points']}
-            points += result['points']
+            format_data[str(result["problem_id"])] = {
+                "time": dt,
+                "points": result["points"],
+            }
+            points += result["points"]
 
         participation.cumtime = max(cumtime, 0)
         participation.score = points
@@ -49,30 +55,50 @@ class DefaultContestFormat(BaseContestFormat):
         format_data = (participation.format_data or {}).get(str(contest_problem.id))
         if format_data:
             return format_html(
-                u'<td class="{state} problem-score-col"><a href="{url}">{points}<div class="solving-time">{time}</div></a></td>',
-                state=(('pretest-' if self.contest.run_pretests_only and contest_problem.is_pretested else '') +
-                       self.best_solution_state(format_data['points'], contest_problem.points)),
-                url=reverse('contest_user_submissions',
-                            args=[self.contest.key, participation.user.user.username, contest_problem.problem.code]),
-                points=floatformat(format_data['points'], -self.contest.points_precision),
-                time=nice_repr(timedelta(seconds=format_data['time']), 'noday'),
+                '<td class="{state} problem-score-col"><a href="{url}">{points}<div class="solving-time">{time}</div></a></td>',
+                state=(
+                    (
+                        "pretest-"
+                        if self.contest.run_pretests_only
+                        and contest_problem.is_pretested
+                        else ""
+                    )
+                    + self.best_solution_state(
+                        format_data["points"], contest_problem.points
+                    )
+                ),
+                url=reverse(
+                    "contest_user_submissions",
+                    args=[
+                        self.contest.key,
+                        participation.user.user.username,
+                        contest_problem.problem.code,
+                    ],
+                ),
+                points=floatformat(
+                    format_data["points"], -self.contest.points_precision
+                ),
+                time=nice_repr(timedelta(seconds=format_data["time"]), "noday"),
             )
         else:
             return mark_safe('<td class="problem-score-col"></td>')
 
     def display_participation_result(self, participation):
         return format_html(
-            u'<td class="user-points">{points}<div class="solving-time">{cumtime}</div></td>',
+            '<td class="user-points">{points}<div class="solving-time">{cumtime}</div></td>',
             points=floatformat(participation.score, -self.contest.points_precision),
-            cumtime=nice_repr(timedelta(seconds=participation.cumtime), 'noday'),
+            cumtime=nice_repr(timedelta(seconds=participation.cumtime), "noday"),
         )
 
     def get_problem_breakdown(self, participation, contest_problems):
-        return [(participation.format_data or {}).get(str(contest_problem.id)) for contest_problem in contest_problems]
+        return [
+            (participation.format_data or {}).get(str(contest_problem.id))
+            for contest_problem in contest_problems
+        ]
 
     def get_contest_problem_label_script(self):
-        return '''
+        return """
             function(n)
                 return tostring(math.floor(n + 1))
             end
-        '''
+        """

judge/contest_format/ecoo.py

@@ -14,17 +14,21 @@ from judge.timezone import from_database_time
 from judge.utils.timedelta import nice_repr
 
 
-@register_contest_format('ecoo')
+@register_contest_format("ecoo")
 class ECOOContestFormat(DefaultContestFormat):
-    name = gettext_lazy('ECOO')
-    config_defaults = {'cumtime': False, 'first_ac_bonus': 10, 'time_bonus': 5}
-    config_validators = {'cumtime': lambda x: True, 'first_ac_bonus': lambda x: x >= 0, 'time_bonus': lambda x: x >= 0}
-    '''
+    name = gettext_lazy("ECOO")
+    config_defaults = {"cumtime": False, "first_ac_bonus": 10, "time_bonus": 5}
+    config_validators = {
+        "cumtime": lambda x: True,
+        "first_ac_bonus": lambda x: x >= 0,
+        "time_bonus": lambda x: x >= 0,
+    }
+    """
         cumtime: Specify True if cumulative time is to be used in breaking ties. Defaults to False.
         first_ac_bonus: The number of points to award if a solution gets AC on its first non-IE/CE run. Defaults to 10.
         time_bonus: Number of minutes to award an extra point for submitting before the contest end.
                     Specify 0 to disable. Defaults to 5.
-    '''
+    """
 
     @classmethod
     def validate(cls, config):
@@ -32,7 +36,9 @@ class ECOOContestFormat(DefaultContestFormat):
             return
 
         if not isinstance(config, dict):
-            raise ValidationError('ECOO-styled contest expects no config or dict as config')
+            raise ValidationError(
+                "ECOO-styled contest expects no config or dict as config"
+            )
 
         for key, value in config.items():
             if key not in cls.config_defaults:
@@ -40,7 +46,9 @@ class ECOOContestFormat(DefaultContestFormat):
             if not isinstance(value, type(cls.config_defaults[key])):
                 raise ValidationError('invalid type for config key "%s"' % key)
             if not cls.config_validators[key](value):
-                raise ValidationError('invalid value "%s" for config key "%s"' % (value, key))
+                raise ValidationError(
+                    'invalid value "%s" for config key "%s"' % (value, key)
+                )
 
     def __init__(self, contest, config):
         self.config = self.config_defaults.copy()
@@ -53,7 +61,8 @@ class ECOOContestFormat(DefaultContestFormat):
         format_data = {}
 
         with connection.cursor() as cursor:
-            cursor.execute('''
+            cursor.execute(
+                """
             SELECT (
                 SELECT MAX(ccs.points)
                     FROM judge_contestsubmission ccs LEFT OUTER JOIN
@@ -69,25 +78,31 @@ class ECOOContestFormat(DefaultContestFormat):
                      judge_contestsubmission cs ON (cs.problem_id = cp.id AND cs.participation_id = %s) LEFT OUTER JOIN
                      judge_submission sub ON (sub.id = cs.submission_id)
                 GROUP BY cp.id
-            ''', (participation.id, participation.id, participation.id))
+            """,
+                (participation.id, participation.id, participation.id),
+            )
 
             for score, time, prob, subs, max_score in cursor.fetchall():
                 time = from_database_time(time)
                 dt = (time - participation.start).total_seconds()
-                if self.config['cumtime']:
+                if self.config["cumtime"]:
                     cumtime += dt
 
                 bonus = 0
                 if score > 0:
                     # First AC bonus
                     if subs == 1 and score == max_score:
-                        bonus += self.config['first_ac_bonus']
+                        bonus += self.config["first_ac_bonus"]
                     # Time bonus
-                    if self.config['time_bonus']:
-                        bonus += (participation.end_time - time).total_seconds() // 60 // self.config['time_bonus']
+                    if self.config["time_bonus"]:
+                        bonus += (
+                            (participation.end_time - time).total_seconds()
+                            // 60
+                            // self.config["time_bonus"]
+                        )
                     points += bonus
 
-                format_data[str(prob)] = {'time': dt, 'points': score, 'bonus': bonus}
+                format_data[str(prob)] = {"time": dt, "points": score, "bonus": bonus}
                 points += score
 
         participation.cumtime = cumtime
@@ -99,25 +114,47 @@ class ECOOContestFormat(DefaultContestFormat):
     def display_user_problem(self, participation, contest_problem):
         format_data = (participation.format_data or {}).get(str(contest_problem.id))
         if format_data:
-            bonus = format_html('<small> +{bonus}</small>',
-                                bonus=floatformat(format_data['bonus'])) if format_data['bonus'] else ''
+            bonus = (
+                format_html(
+                    "<small> +{bonus}</small>", bonus=floatformat(format_data["bonus"])
+                )
+                if format_data["bonus"]
+                else ""
+            )
 
             return format_html(
                 '<td class="{state}"><a href="{url}">{points}{bonus}<div class="solving-time">{time}</div></a></td>',
-                state=(('pretest-' if self.contest.run_pretests_only and contest_problem.is_pretested else '') +
-                       self.best_solution_state(format_data['points'], contest_problem.points)),
-                url=reverse('contest_user_submissions',
-                            args=[self.contest.key, participation.user.user.username, contest_problem.problem.code]),
-                points=floatformat(format_data['points']),
+                state=(
+                    (
+                        "pretest-"
+                        if self.contest.run_pretests_only
+                        and contest_problem.is_pretested
+                        else ""
+                    )
+                    + self.best_solution_state(
+                        format_data["points"], contest_problem.points
+                    )
+                ),
+                url=reverse(
+                    "contest_user_submissions",
+                    args=[
+                        self.contest.key,
+                        participation.user.user.username,
+                        contest_problem.problem.code,
+                    ],
+                ),
+                points=floatformat(format_data["points"]),
                 bonus=bonus,
-                time=nice_repr(timedelta(seconds=format_data['time']), 'noday'),
+                time=nice_repr(timedelta(seconds=format_data["time"]), "noday"),
             )
         else:
-            return mark_safe('<td></td>')
+            return mark_safe("<td></td>")
 
     def display_participation_result(self, participation):
         return format_html(
             '<td class="user-points">{points}<div class="solving-time">{cumtime}</div></td>',
             points=floatformat(participation.score),
-            cumtime=nice_repr(timedelta(seconds=participation.cumtime), 'noday') if self.config['cumtime'] else '',
+            cumtime=nice_repr(timedelta(seconds=participation.cumtime), "noday")
+            if self.config["cumtime"]
+            else "",
         )

judge/contest_format/icpc.py

@@ -14,14 +14,14 @@ from judge.timezone import from_database_time
 from judge.utils.timedelta import nice_repr
 
 
-@register_contest_format('icpc')
+@register_contest_format("icpc")
 class ICPCContestFormat(DefaultContestFormat):
-    name = gettext_lazy('ICPC')
-    config_defaults = {'penalty': 20}
-    config_validators = {'penalty': lambda x: x >= 0}
-    '''
+    name = gettext_lazy("ICPC")
+    config_defaults = {"penalty": 20}
+    config_validators = {"penalty": lambda x: x >= 0}
+    """
         penalty: Number of penalty minutes each incorrect submission adds. Defaults to 20.
-    '''
+    """
 
     @classmethod
     def validate(cls, config):
@@ -29,7 +29,9 @@ class ICPCContestFormat(DefaultContestFormat):
             return
 
         if not isinstance(config, dict):
-            raise ValidationError('ICPC-styled contest expects no config or dict as config')
+            raise ValidationError(
+                "ICPC-styled contest expects no config or dict as config"
+            )
 
         for key, value in config.items():
             if key not in cls.config_defaults:
@@ -37,7 +39,9 @@ class ICPCContestFormat(DefaultContestFormat):
             if not isinstance(value, type(cls.config_defaults[key])):
                 raise ValidationError('invalid type for config key "%s"' % key)
             if not cls.config_validators[key](value):
-                raise ValidationError('invalid value "%s" for config key "%s"' % (value, key))
+                raise ValidationError(
+                    'invalid value "%s" for config key "%s"' % (value, key)
+                )
 
     def __init__(self, contest, config):
         self.config = self.config_defaults.copy()
@@ -52,7 +56,8 @@ class ICPCContestFormat(DefaultContestFormat):
         format_data = {}
 
         with connection.cursor() as cursor:
-            cursor.execute('''
+            cursor.execute(
+                """
                 SELECT MAX(cs.points) as `points`, (
                     SELECT MIN(csub.date)
                         FROM judge_contestsubmission ccs LEFT OUTER JOIN
@@ -63,21 +68,27 @@ class ICPCContestFormat(DefaultContestFormat):
                      judge_contestsubmission cs ON (cs.problem_id = cp.id AND cs.participation_id = %s) LEFT OUTER JOIN
                      judge_submission sub ON (sub.id = cs.submission_id)
                 GROUP BY cp.id
-            ''', (participation.id, participation.id))
+            """,
+                (participation.id, participation.id),
+            )
 
             for points, time, prob in cursor.fetchall():
                 time = from_database_time(time)
                 dt = (time - participation.start).total_seconds()
 
                 # Compute penalty
-                if self.config['penalty']:
+                if self.config["penalty"]:
                     # An IE can have a submission result of `None`
-                    subs = participation.submissions.exclude(submission__result__isnull=True) \
-                                                    .exclude(submission__result__in=['IE', 'CE']) \
+                    subs = (
+                        participation.submissions.exclude(
+                            submission__result__isnull=True
+                        )
+                        .exclude(submission__result__in=["IE", "CE"])
                         .filter(problem_id=prob)
+                    )
                     if points:
                         prev = subs.filter(submission__date__lte=time).count() - 1
-                        penalty += prev * self.config['penalty'] * 60
+                        penalty += prev * self.config["penalty"] * 60
                     else:
                         # We should always display the penalty, even if the user has a score of 0
                         prev = subs.count()
@@ -88,7 +99,7 @@ class ICPCContestFormat(DefaultContestFormat):
                     cumtime += dt
                     last = max(last, dt)
 
-                format_data[str(prob)] = {'time': dt, 'points': points, 'penalty': prev}
+                format_data[str(prob)] = {"time": dt, "points": points, "penalty": prev}
                 score += points
 
         participation.cumtime = max(0, cumtime + penalty)
@@ -100,23 +111,44 @@ class ICPCContestFormat(DefaultContestFormat):
     def display_user_problem(self, participation, contest_problem):
         format_data = (participation.format_data or {}).get(str(contest_problem.id))
         if format_data:
-            penalty = format_html('<small style="color:red"> ({penalty})</small>',
-                                  penalty=floatformat(format_data['penalty'])) if format_data['penalty'] else ''
+            penalty = (
+                format_html(
+                    '<small style="color:red"> ({penalty})</small>',
+                    penalty=floatformat(format_data["penalty"]),
+                )
+                if format_data["penalty"]
+                else ""
+            )
             return format_html(
                 '<td class="{state}"><a href="{url}">{points}{penalty}<div class="solving-time">{time}</div></a></td>',
-                state=(('pretest-' if self.contest.run_pretests_only and contest_problem.is_pretested else '') +
-                       self.best_solution_state(format_data['points'], contest_problem.points)),
-                url=reverse('contest_user_submissions',
-                            args=[self.contest.key, participation.user.user.username, contest_problem.problem.code]),
-                points=floatformat(format_data['points']),
+                state=(
+                    (
+                        "pretest-"
+                        if self.contest.run_pretests_only
+                        and contest_problem.is_pretested
+                        else ""
+                    )
+                    + self.best_solution_state(
+                        format_data["points"], contest_problem.points
+                    )
+                ),
+                url=reverse(
+                    "contest_user_submissions",
+                    args=[
+                        self.contest.key,
+                        participation.user.user.username,
+                        contest_problem.problem.code,
+                    ],
+                ),
+                points=floatformat(format_data["points"]),
                 penalty=penalty,
-                time=nice_repr(timedelta(seconds=format_data['time']), 'noday'),
+                time=nice_repr(timedelta(seconds=format_data["time"]), "noday"),
             )
         else:
-            return mark_safe('<td></td>')
+            return mark_safe("<td></td>")
 
     def get_contest_problem_label_script(self):
-        return '''
+        return """
             function(n)
                 n = n + 1
                 ret = ""
@@ -126,4 +158,4 @@ class ICPCContestFormat(DefaultContestFormat):
                 end
                 return ret
             end
-        '''
+        """

judge/contest_format/ioi.py

@@ -14,13 +14,13 @@ from judge.timezone import from_database_time
 from judge.utils.timedelta import nice_repr
 
 
-@register_contest_format('ioi')
+@register_contest_format("ioi")
 class IOIContestFormat(DefaultContestFormat):
-    name = gettext_lazy('IOI')
-    config_defaults = {'cumtime': False}
-    '''
+    name = gettext_lazy("IOI")
+    config_defaults = {"cumtime": False}
+    """
         cumtime: Specify True if time penalties are to be computed. Defaults to False.
-    '''
+    """
 
     @classmethod
     def validate(cls, config):
@@ -28,7 +28,9 @@ class IOIContestFormat(DefaultContestFormat):
             return
 
         if not isinstance(config, dict):
-            raise ValidationError('IOI-styled contest expects no config or dict as config')
+            raise ValidationError(
+                "IOI-styled contest expects no config or dict as config"
+            )
 
         for key, value in config.items():
             if key not in cls.config_defaults:
@@ -47,7 +49,8 @@ class IOIContestFormat(DefaultContestFormat):
         format_data = {}
 
         with connection.cursor() as cursor:
-            cursor.execute('''
+            cursor.execute(
+                """
             SELECT MAX(cs.points) as `score`, (
                 SELECT MIN(csub.date)
                     FROM judge_contestsubmission ccs LEFT OUTER JOIN
@@ -58,17 +61,21 @@ class IOIContestFormat(DefaultContestFormat):
                  judge_contestsubmission cs ON (cs.problem_id = cp.id AND cs.participation_id = %s) LEFT OUTER JOIN
                  judge_submission sub ON (sub.id = cs.submission_id)
             GROUP BY cp.id
-            ''', (participation.id, participation.id))
+            """,
+                (participation.id, participation.id),
+            )
 
             for score, time, prob in cursor.fetchall():
-                if self.config['cumtime']:
-                    dt = (from_database_time(time) - participation.start).total_seconds()
+                if self.config["cumtime"]:
+                    dt = (
+                        from_database_time(time) - participation.start
+                    ).total_seconds()
                     if score:
                         cumtime += dt
                 else:
                     dt = 0
 
-                format_data[str(prob)] = {'time': dt, 'points': score}
+                format_data[str(prob)] = {"time": dt, "points": score}
                 points += score
 
         participation.cumtime = max(cumtime, 0)
@@ -82,12 +89,29 @@ class IOIContestFormat(DefaultContestFormat):
         if format_data:
             return format_html(
                 '<td class="{state} problem-score-col"><a href="{url}">{points}<div class="solving-time">{time}</div></a></td>',
-                state=(('pretest-' if self.contest.run_pretests_only and contest_problem.is_pretested else '') +
-                       self.best_solution_state(format_data['points'], contest_problem.points)),
-                url=reverse('contest_user_submissions',
-                            args=[self.contest.key, participation.user.user.username, contest_problem.problem.code]),
-                points=floatformat(format_data['points']),
-                time=nice_repr(timedelta(seconds=format_data['time']), 'noday') if self.config['cumtime'] else '',
+                state=(
+                    (
+                        "pretest-"
+                        if self.contest.run_pretests_only
+                        and contest_problem.is_pretested
+                        else ""
+                    )
+                    + self.best_solution_state(
+                        format_data["points"], contest_problem.points
+                    )
+                ),
+                url=reverse(
+                    "contest_user_submissions",
+                    args=[
+                        self.contest.key,
+                        participation.user.user.username,
+                        contest_problem.problem.code,
+                    ],
+                ),
+                points=floatformat(format_data["points"]),
+                time=nice_repr(timedelta(seconds=format_data["time"]), "noday")
+                if self.config["cumtime"]
+                else "",
             )
         else:
             return mark_safe('<td class="problem-score-col"></td>')
@@ -96,5 +120,7 @@ class IOIContestFormat(DefaultContestFormat):
         return format_html(
             '<td class="user-points">{points}<div class="solving-time">{cumtime}</div></td>',
             points=floatformat(participation.score),
-            cumtime=nice_repr(timedelta(seconds=participation.cumtime), 'noday') if self.config['cumtime'] else '',
+            cumtime=nice_repr(timedelta(seconds=participation.cumtime), "noday")
+            if self.config["cumtime"]
+            else "",
         )

judge/dblock.py

@@ -5,19 +5,21 @@ from django.db import connection, transaction
 
 class LockModel(object):
     def __init__(self, write, read=()):
-        self.tables = ', '.join(chain(
-            ('`%s` WRITE' % model._meta.db_table for model in write),
-            ('`%s` READ' % model._meta.db_table for model in read),
-        ))
+        self.tables = ", ".join(
+            chain(
+                ("`%s` WRITE" % model._meta.db_table for model in write),
+                ("`%s` READ" % model._meta.db_table for model in read),
+            )
+        )
         self.cursor = connection.cursor()
 
     def __enter__(self):
-        self.cursor.execute('LOCK TABLES ' + self.tables)
+        self.cursor.execute("LOCK TABLES " + self.tables)
 
     def __exit__(self, exc_type, exc_val, exc_tb):
         if exc_type is None:
             transaction.commit()
         else:
             transaction.rollback()
-        self.cursor.execute('UNLOCK TABLES')
+        self.cursor.execute("UNLOCK TABLES")
         self.cursor.close()

judge/event_poster.py

@@ -1,6 +1,6 @@
 from django.conf import settings
 
-__all__ = ['last', 'post']
+__all__ = ["last", "post"]
 
 if not settings.EVENT_DAEMON_USE:
     real = False
@@ -10,9 +10,12 @@ if not settings.EVENT_DAEMON_USE:
 
     def last():
         return 0
-elif hasattr(settings, 'EVENT_DAEMON_AMQP'):
+
+elif hasattr(settings, "EVENT_DAEMON_AMQP"):
     from .event_poster_amqp import last, post
+
     real = True
 else:
     from .event_poster_ws import last, post
+
     real = True

judge/event_poster_amqp.py

@@ -6,7 +6,7 @@ import pika
 from django.conf import settings
 from pika.exceptions import AMQPError
 
-__all__ = ['EventPoster', 'post', 'last']
+__all__ = ["EventPoster", "post", "last"]
 
 
 class EventPoster(object):
@@ -15,14 +15,19 @@ class EventPoster(object):
         self._exchange = settings.EVENT_DAEMON_AMQP_EXCHANGE
 
     def _connect(self):
-        self._conn = pika.BlockingConnection(pika.URLParameters(settings.EVENT_DAEMON_AMQP))
+        self._conn = pika.BlockingConnection(
+            pika.URLParameters(settings.EVENT_DAEMON_AMQP)
+        )
         self._chan = self._conn.channel()
 
     def post(self, channel, message, tries=0):
         try:
             id = int(time() * 1000000)
-            self._chan.basic_publish(self._exchange, '',
-                                     json.dumps({'id': id, 'channel': channel, 'message': message}))
+            self._chan.basic_publish(
+                self._exchange,
+                "",
+                json.dumps({"id": id, "channel": channel, "message": message}),
+            )
             return id
         except AMQPError:
             if tries > 10:
@@ -35,7 +40,7 @@ _local = threading.local()
 
 
 def _get_poster():
-    if 'poster' not in _local.__dict__:
+    if "poster" not in _local.__dict__:
         _local.poster = EventPoster()
     return _local.poster
 

judge/event_poster_ws.py

@@ -5,7 +5,7 @@ import threading
 from django.conf import settings
 from websocket import WebSocketException, create_connection
 
-__all__ = ['EventPostingError', 'EventPoster', 'post', 'last']
+__all__ = ["EventPostingError", "EventPoster", "post", "last"]
 _local = threading.local()
 
 
@@ -20,19 +20,23 @@ class EventPoster(object):
     def _connect(self):
         self._conn = create_connection(settings.EVENT_DAEMON_POST)
         if settings.EVENT_DAEMON_KEY is not None:
-            self._conn.send(json.dumps({'command': 'auth', 'key': settings.EVENT_DAEMON_KEY}))
+            self._conn.send(
+                json.dumps({"command": "auth", "key": settings.EVENT_DAEMON_KEY})
+            )
             resp = json.loads(self._conn.recv())
-            if resp['status'] == 'error':
-                raise EventPostingError(resp['code'])
+            if resp["status"] == "error":
+                raise EventPostingError(resp["code"])
 
     def post(self, channel, message, tries=0):
         try:
-            self._conn.send(json.dumps({'command': 'post', 'channel': channel, 'message': message}))
+            self._conn.send(
+                json.dumps({"command": "post", "channel": channel, "message": message})
+            )
             resp = json.loads(self._conn.recv())
-            if resp['status'] == 'error':
-                raise EventPostingError(resp['code'])
+            if resp["status"] == "error":
+                raise EventPostingError(resp["code"])
             else:
-                return resp['id']
+                return resp["id"]
         except WebSocketException:
             if tries > 10:
                 raise
@@ -43,10 +47,10 @@ class EventPoster(object):
         try:
             self._conn.send('{"command": "last-msg"}')
             resp = json.loads(self._conn.recv())
-            if resp['status'] == 'error':
-                raise EventPostingError(resp['code'])
+            if resp["status"] == "error":
+                raise EventPostingError(resp["code"])
             else:
-                return resp['id']
+                return resp["id"]
         except WebSocketException:
             if tries > 10:
                 raise
@@ -55,7 +59,7 @@ class EventPoster(object):
 
 
 def _get_poster():
-    if 'poster' not in _local.__dict__:
+    if "poster" not in _local.__dict__:
         _local.poster = EventPoster()
     return _local.poster
 

judge/feed.py

@@ -12,27 +12,35 @@ import re
 
 
 # https://lsimons.wordpress.com/2011/03/17/stripping-illegal-characters-out-of-xml-in-python/
-def escape_xml_illegal_chars(val, replacement='?'):
-    _illegal_xml_chars_RE = re.compile(u'[\x00-\x08\x0b\x0c\x0e-\x1F\uD800-\uDFFF\uFFFE\uFFFF]')
+def escape_xml_illegal_chars(val, replacement="?"):
+    _illegal_xml_chars_RE = re.compile(
+        "[\x00-\x08\x0b\x0c\x0e-\x1F\uD800-\uDFFF\uFFFE\uFFFF]"
+    )
     return _illegal_xml_chars_RE.sub(replacement, val)
 
+
 class ProblemFeed(Feed):
-    title = 'Recently Added %s Problems' % settings.SITE_NAME
-    link = '/'
-    description = 'The latest problems added on the %s website' % settings.SITE_LONG_NAME
+    title = "Recently Added %s Problems" % settings.SITE_NAME
+    link = "/"
+    description = (
+        "The latest problems added on the %s website" % settings.SITE_LONG_NAME
+    )
 
     def items(self):
-        return Problem.objects.filter(is_public=True, is_organization_private=False).defer('description')\
-                      .order_by('-date', '-id')[:25]
+        return (
+            Problem.objects.filter(is_public=True, is_organization_private=False)
+            .defer("description")
+            .order_by("-date", "-id")[:25]
+        )
 
     def item_title(self, problem):
         return problem.name
 
     def item_description(self, problem):
-        key = 'problem_feed:%d' % problem.id
+        key = "problem_feed:%d" % problem.id
         desc = cache.get(key)
         if desc is None:
-            desc = str(markdown(problem.description, 'problem'))[:500] + '...'
+            desc = str(markdown(problem.description, "problem"))[:500] + "..."
             desc = escape_xml_illegal_chars(desc)
             cache.set(key, desc, 86400)
         return desc
@@ -49,21 +57,21 @@ class AtomProblemFeed(ProblemFeed):
 
 
 class CommentFeed(Feed):
-    title = 'Latest %s Comments' % settings.SITE_NAME
-    link = '/'
-    description = 'The latest comments on the %s website' % settings.SITE_LONG_NAME
+    title = "Latest %s Comments" % settings.SITE_NAME
+    link = "/"
+    description = "The latest comments on the %s website" % settings.SITE_LONG_NAME
 
     def items(self):
         return Comment.most_recent(AnonymousUser(), 25)
 
     def item_title(self, comment):
-        return '%s -> %s' % (comment.author.user.username, comment.page_title)
+        return "%s -> %s" % (comment.author.user.username, comment.page_title)
 
     def item_description(self, comment):
-        key = 'comment_feed:%d' % comment.id
+        key = "comment_feed:%d" % comment.id
         desc = cache.get(key)
         if desc is None:
-            desc = str(markdown(comment.body, 'comment'))
+            desc = str(markdown(comment.body, "comment"))
             desc = escape_xml_illegal_chars(desc)
             cache.set(key, desc, 86400)
         return desc
@@ -80,21 +88,23 @@ class AtomCommentFeed(CommentFeed):
 
 
 class BlogFeed(Feed):
-    title = 'Latest %s Blog Posts' % settings.SITE_NAME
-    link = '/'
-    description = 'The latest blog posts from the %s' % settings.SITE_LONG_NAME
+    title = "Latest %s Blog Posts" % settings.SITE_NAME
+    link = "/"
+    description = "The latest blog posts from the %s" % settings.SITE_LONG_NAME
 
     def items(self):
-        return BlogPost.objects.filter(visible=True, publish_on__lte=timezone.now()).order_by('-sticky', '-publish_on')
+        return BlogPost.objects.filter(
+            visible=True, publish_on__lte=timezone.now()
+        ).order_by("-sticky", "-publish_on")
 
     def item_title(self, post):
         return post.title
 
     def item_description(self, post):
-        key = 'blog_feed:%d' % post.id
+        key = "blog_feed:%d" % post.id
         summary = cache.get(key)
         if summary is None:
-            summary = str(markdown(post.summary or post.content, 'blog'))
+            summary = str(markdown(post.summary or post.content, "blog"))
             summary = escape_xml_illegal_chars(summary)
             cache.set(key, summary, 86400)
         return summary

judge/forms.py

@@ -12,159 +12,211 @@ from django.urls import reverse_lazy
 from django.utils.translation import gettext_lazy as _
 
 from django_ace import AceWidget
-from judge.models import Contest, Language, Organization, PrivateMessage, Problem, ProblemPointsVote, Profile, Submission
+from judge.models import (
+    Contest,
+    Language,
+    Organization,
+    PrivateMessage,
+    Problem,
+    ProblemPointsVote,
+    Profile,
+    Submission,
+)
 from judge.utils.subscription import newsletter_id
-from judge.widgets import HeavyPreviewPageDownWidget, MathJaxPagedownWidget, PagedownWidget, Select2MultipleWidget, \
-    Select2Widget
+from judge.widgets import (
+    HeavyPreviewPageDownWidget,
+    MathJaxPagedownWidget,
+    PagedownWidget,
+    Select2MultipleWidget,
+    Select2Widget,
+)
 
 
-def fix_unicode(string, unsafe=tuple('\u202a\u202b\u202d\u202e')):
-    return string + (sum(k in unsafe for k in string) - string.count('\u202c')) * '\u202c'
+def fix_unicode(string, unsafe=tuple("\u202a\u202b\u202d\u202e")):
+    return (
+        string + (sum(k in unsafe for k in string) - string.count("\u202c")) * "\u202c"
+    )
 
 
 class ProfileForm(ModelForm):
     if newsletter_id is not None:
-        newsletter = forms.BooleanField(label=_('Subscribe to contest updates'), initial=False, required=False)
-    test_site = forms.BooleanField(label=_('Enable experimental features'), initial=False, required=False)
+        newsletter = forms.BooleanField(
+            label=_("Subscribe to contest updates"), initial=False, required=False
+        )
+    test_site = forms.BooleanField(
+        label=_("Enable experimental features"), initial=False, required=False
+    )
 
     class Meta:
         model = Profile
-        fields = ['about', 'organizations', 'timezone', 'language', 'ace_theme', 'user_script']
+        fields = [
+            "about",
+            "organizations",
+            "timezone",
+            "language",
+            "ace_theme",
+            "user_script",
+        ]
         widgets = {
-            'user_script': AceWidget(theme='github'),
-            'timezone': Select2Widget(attrs={'style': 'width:200px'}),
-            'language': Select2Widget(attrs={'style': 'width:200px'}),
-            'ace_theme': Select2Widget(attrs={'style': 'width:200px'}),
+            "user_script": AceWidget(theme="github"),
+            "timezone": Select2Widget(attrs={"style": "width:200px"}),
+            "language": Select2Widget(attrs={"style": "width:200px"}),
+            "ace_theme": Select2Widget(attrs={"style": "width:200px"}),
         }
 
         has_math_config = bool(settings.MATHOID_URL)
         if has_math_config:
-            fields.append('math_engine')
-            widgets['math_engine'] = Select2Widget(attrs={'style': 'width:200px'})
+            fields.append("math_engine")
+            widgets["math_engine"] = Select2Widget(attrs={"style": "width:200px"})
 
         if HeavyPreviewPageDownWidget is not None:
-            widgets['about'] = HeavyPreviewPageDownWidget(
-                preview=reverse_lazy('profile_preview'),
-                attrs={'style': 'max-width:700px;min-width:700px;width:700px'},
+            widgets["about"] = HeavyPreviewPageDownWidget(
+                preview=reverse_lazy("profile_preview"),
+                attrs={"style": "max-width:700px;min-width:700px;width:700px"},
             )
 
     def clean(self):
-        organizations = self.cleaned_data.get('organizations') or []
+        organizations = self.cleaned_data.get("organizations") or []
         max_orgs = settings.DMOJ_USER_MAX_ORGANIZATION_COUNT
 
         if sum(org.is_open for org in organizations) > max_orgs:
             raise ValidationError(
-                _('You may not be part of more than {count} public organizations.').format(count=max_orgs))
+                _(
+                    "You may not be part of more than {count} public organizations."
+                ).format(count=max_orgs)
+            )
 
         return self.cleaned_data
 
     def __init__(self, *args, **kwargs):
-        user = kwargs.pop('user', None)
+        user = kwargs.pop("user", None)
         super(ProfileForm, self).__init__(*args, **kwargs)
-        if not user.has_perm('judge.edit_all_organization'):
-            self.fields['organizations'].queryset = Organization.objects.filter(
+        if not user.has_perm("judge.edit_all_organization"):
+            self.fields["organizations"].queryset = Organization.objects.filter(
                 Q(is_open=True) | Q(id__in=user.profile.organizations.all()),
             )
 
 
 class ProblemSubmitForm(ModelForm):
-    source = CharField(max_length=65536, widget=AceWidget(theme='twilight', no_ace_media=True))
+    source = CharField(
+        max_length=65536, widget=AceWidget(theme="twilight", no_ace_media=True)
+    )
     judge = ChoiceField(choices=(), widget=forms.HiddenInput(), required=False)
 
     def __init__(self, *args, judge_choices=(), **kwargs):
         super(ProblemSubmitForm, self).__init__(*args, **kwargs)
-        self.fields['language'].empty_label = None
-        self.fields['language'].label_from_instance = attrgetter('display_name')
-        self.fields['language'].queryset = Language.objects.filter(judges__online=True).distinct()
+        self.fields["language"].empty_label = None
+        self.fields["language"].label_from_instance = attrgetter("display_name")
+        self.fields["language"].queryset = Language.objects.filter(
+            judges__online=True
+        ).distinct()
 
         if judge_choices:
-            self.fields['judge'].widget = Select2Widget(
-                attrs={'style': 'width: 150px', 'data-placeholder': _('Any judge')},
+            self.fields["judge"].widget = Select2Widget(
+                attrs={"style": "width: 150px", "data-placeholder": _("Any judge")},
             )
-            self.fields['judge'].choices = judge_choices
+            self.fields["judge"].choices = judge_choices
 
     class Meta:
         model = Submission
-        fields = ['language']
+        fields = ["language"]
 
 
 class EditOrganizationForm(ModelForm):
     class Meta:
         model = Organization
-        fields = ['about', 'logo_override_image', 'admins']
-        widgets = {'admins': Select2MultipleWidget()}
+        fields = ["about", "logo_override_image", "admins"]
+        widgets = {"admins": Select2MultipleWidget()}
         if HeavyPreviewPageDownWidget is not None:
-            widgets['about'] = HeavyPreviewPageDownWidget(preview=reverse_lazy('organization_preview'))
+            widgets["about"] = HeavyPreviewPageDownWidget(
+                preview=reverse_lazy("organization_preview")
+            )
 
 
 class NewMessageForm(ModelForm):
     class Meta:
         model = PrivateMessage
-        fields = ['title', 'content']
+        fields = ["title", "content"]
         widgets = {}
         if PagedownWidget is not None:
-            widgets['content'] = MathJaxPagedownWidget()
+            widgets["content"] = MathJaxPagedownWidget()
 
 
 class CustomAuthenticationForm(AuthenticationForm):
     def __init__(self, *args, **kwargs):
         super(CustomAuthenticationForm, self).__init__(*args, **kwargs)
-        self.fields['username'].widget.attrs.update({'placeholder': _('Username')})
-        self.fields['password'].widget.attrs.update({'placeholder': _('Password')})
+        self.fields["username"].widget.attrs.update({"placeholder": _("Username")})
+        self.fields["password"].widget.attrs.update({"placeholder": _("Password")})
 
-        self.has_google_auth = self._has_social_auth('GOOGLE_OAUTH2')
-        self.has_facebook_auth = self._has_social_auth('FACEBOOK')
-        self.has_github_auth = self._has_social_auth('GITHUB_SECURE')
+        self.has_google_auth = self._has_social_auth("GOOGLE_OAUTH2")
+        self.has_facebook_auth = self._has_social_auth("FACEBOOK")
+        self.has_github_auth = self._has_social_auth("GITHUB_SECURE")
 
     def _has_social_auth(self, key):
-        return (getattr(settings, 'SOCIAL_AUTH_%s_KEY' % key, None) and
-                getattr(settings, 'SOCIAL_AUTH_%s_SECRET' % key, None))
+        return getattr(settings, "SOCIAL_AUTH_%s_KEY" % key, None) and getattr(
+            settings, "SOCIAL_AUTH_%s_SECRET" % key, None
+        )
 
 
 class NoAutoCompleteCharField(forms.CharField):
     def widget_attrs(self, widget):
         attrs = super(NoAutoCompleteCharField, self).widget_attrs(widget)
-        attrs['autocomplete'] = 'off'
+        attrs["autocomplete"] = "off"
         return attrs
 
 
 class TOTPForm(Form):
     TOLERANCE = settings.DMOJ_TOTP_TOLERANCE_HALF_MINUTES
 
-    totp_token = NoAutoCompleteCharField(validators=[
-        RegexValidator('^[0-9]{6}$', _('Two Factor Authentication tokens must be 6 decimal digits.')),
-    ])
+    totp_token = NoAutoCompleteCharField(
+        validators=[
+            RegexValidator(
+                "^[0-9]{6}$",
+                _("Two Factor Authentication tokens must be 6 decimal digits."),
+            ),
+        ]
+    )
 
     def __init__(self, *args, **kwargs):
-        self.totp_key = kwargs.pop('totp_key')
+        self.totp_key = kwargs.pop("totp_key")
         super(TOTPForm, self).__init__(*args, **kwargs)
 
     def clean_totp_token(self):
-        if not pyotp.TOTP(self.totp_key).verify(self.cleaned_data['totp_token'], valid_window=self.TOLERANCE):
-            raise ValidationError(_('Invalid Two Factor Authentication token.'))
+        if not pyotp.TOTP(self.totp_key).verify(
+            self.cleaned_data["totp_token"], valid_window=self.TOLERANCE
+        ):
+            raise ValidationError(_("Invalid Two Factor Authentication token."))
 
 
 class ProblemCloneForm(Form):
-    code = CharField(max_length=20, validators=[RegexValidator('^[a-z0-9]+$', _('Problem code must be ^[a-z0-9]+$'))])
+    code = CharField(
+        max_length=20,
+        validators=[
+            RegexValidator("^[a-z0-9]+$", _("Problem code must be ^[a-z0-9]+$"))
+        ],
+    )
 
     def clean_code(self):
-        code = self.cleaned_data['code']
+        code = self.cleaned_data["code"]
         if Problem.objects.filter(code=code).exists():
-            raise ValidationError(_('Problem with code already exists.'))
+            raise ValidationError(_("Problem with code already exists."))
         return code
 
 
 class ContestCloneForm(Form):
-    key = CharField(max_length=20, validators=[RegexValidator('^[a-z0-9]+$', _('Contest id must be ^[a-z0-9]+$'))])
+    key = CharField(
+        max_length=20,
+        validators=[RegexValidator("^[a-z0-9]+$", _("Contest id must be ^[a-z0-9]+$"))],
+    )
 
     def clean_key(self):
-        key = self.cleaned_data['key']
+        key = self.cleaned_data["key"]
         if Contest.objects.filter(key=key).exists():
-            raise ValidationError(_('Contest with key already exists.'))
+            raise ValidationError(_("Contest with key already exists."))
         return key
 
 
 class ProblemPointsVoteForm(ModelForm):
     class Meta:
         model = ProblemPointsVote
-        fields = ['points']
+        fields = ["points"]

judge/fulltext.py

@@ -5,10 +5,10 @@ from django.db.models.query import QuerySet
 
 
 class SearchQuerySet(QuerySet):
-    DEFAULT = ''
-    BOOLEAN = ' IN BOOLEAN MODE'
-    NATURAL_LANGUAGE = ' IN NATURAL LANGUAGE MODE'
-    QUERY_EXPANSION = ' WITH QUERY EXPANSION'
+    DEFAULT = ""
+    BOOLEAN = " IN BOOLEAN MODE"
+    NATURAL_LANGUAGE = " IN NATURAL LANGUAGE MODE"
+    QUERY_EXPANSION = " WITH QUERY EXPANSION"
 
     def __init__(self, fields=None, **kwargs):
         super(SearchQuerySet, self).__init__(**kwargs)
@@ -25,20 +25,26 @@ class SearchQuerySet(QuerySet):
         # Get the table name and column names from the model
         # in `table_name`.`column_name` style
         columns = [meta.get_field(name).column for name in self._search_fields]
-        full_names = ['%s.%s' %
-                      (connection.ops.quote_name(meta.db_table),
-                       connection.ops.quote_name(column))
-                      for column in columns]
+        full_names = [
+            "%s.%s"
+            % (
+                connection.ops.quote_name(meta.db_table),
+                connection.ops.quote_name(column),
+            )
+            for column in columns
+        ]
 
         # Create the MATCH...AGAINST expressions
-        fulltext_columns = ', '.join(full_names)
-        match_expr = ('MATCH(%s) AGAINST (%%s%s)' % (fulltext_columns, mode))
+        fulltext_columns = ", ".join(full_names)
+        match_expr = "MATCH(%s) AGAINST (%%s%s)" % (fulltext_columns, mode)
 
         # Add the extra SELECT and WHERE options
-        return self.extra(select={'relevance': match_expr},
+        return self.extra(
+            select={"relevance": match_expr},
             select_params=[query],
             where=[match_expr],
-                          params=[query])
+            params=[query],
+        )
 
 
 class SearchManager(models.Manager):

judge/highlight_code.py

@@ -1,10 +1,10 @@
 from django.utils.html import escape, mark_safe
 
-__all__ = ['highlight_code']
+__all__ = ["highlight_code"]
 
 
 def _make_pre_code(code):
-    return mark_safe('<pre>' + escape(code) + '</pre>')
+    return mark_safe("<pre>" + escape(code) + "</pre>")
 
 
 def _wrap_code(inner):
@@ -20,19 +20,28 @@ try:
     import pygments.formatters.html
     import pygments.util
 except ImportError:
+
     def highlight_code(code, language, cssclass=None):
         return _make_pre_code(code)
+
 else:
+
     class HtmlCodeFormatter(pygments.formatters.HtmlFormatter):
         def wrap(self, source, outfile):
             return self._wrap_div(self._wrap_pre(_wrap_code(source)))
 
-    def highlight_code(code, language, cssclass='codehilite', linenos=True):
+    def highlight_code(code, language, cssclass="codehilite", linenos=True):
         try:
             lexer = pygments.lexers.get_lexer_by_name(language)
         except pygments.util.ClassNotFound:
             return _make_pre_code(code)
 
         if linenos:
-            return mark_safe(pygments.highlight(code, lexer, HtmlCodeFormatter(cssclass=cssclass, linenos='table')))
-        return mark_safe(pygments.highlight(code, lexer, HtmlCodeFormatter(cssclass=cssclass)))
+            return mark_safe(
+                pygments.highlight(
+                    code, lexer, HtmlCodeFormatter(cssclass=cssclass, linenos="table")
+                )
+            )
+        return mark_safe(
+            pygments.highlight(code, lexer, HtmlCodeFormatter(cssclass=cssclass))
+        )

judge/jinja2/__init__.py

@@ -8,19 +8,33 @@ from statici18n.templatetags.statici18n import inlinei18n
 
 from judge.highlight_code import highlight_code
 from judge.user_translations import gettext
-from . import (camo, chat, datetime, filesize, gravatar, language, markdown, rating, reference, render, social,
-               spaceless, submission, timedelta)
+from . import (
+    camo,
+    chat,
+    datetime,
+    filesize,
+    gravatar,
+    language,
+    markdown,
+    rating,
+    reference,
+    render,
+    social,
+    spaceless,
+    submission,
+    timedelta,
+)
 from . import registry
 
-registry.function('str', str)
-registry.filter('str', str)
-registry.filter('json', json.dumps)
-registry.filter('highlight', highlight_code)
-registry.filter('urlquote', urlquote)
-registry.filter('roundfloat', round)
-registry.function('inlinei18n', inlinei18n)
-registry.function('mptt_tree', get_cached_trees)
-registry.function('user_trans', gettext)
+registry.function("str", str)
+registry.filter("str", str)
+registry.filter("json", json.dumps)
+registry.filter("highlight", highlight_code)
+registry.filter("urlquote", urlquote)
+registry.filter("roundfloat", round)
+registry.function("inlinei18n", inlinei18n)
+registry.function("mptt_tree", get_cached_trees)
+registry.function("user_trans", gettext)
 
 
 @registry.function

judge/jinja2/camo.py

@@ -1,6 +1,7 @@
 from judge.utils.camo import client as camo_client
 from . import registry
 
+
 @registry.filter
 def camo(url):
     if camo_client is None:

judge/jinja2/chat.py

@@ -1,6 +1,7 @@
 from . import registry
 from chat_box.utils import encrypt_url
 
+
 @registry.function
 def chat_param(request_profile, profile):
     return encrypt_url(request_profile.id, profile.id)

judge/jinja2/datetime.py

@@ -10,7 +10,7 @@ from . import registry
 def localtime_wrapper(func):
     @functools.wraps(func)
     def wrapper(datetime, *args, **kwargs):
-        if getattr(datetime, 'convert_to_local_time', True):
+        if getattr(datetime, "convert_to_local_time", True):
             datetime = localtime(datetime)
         return func(datetime, *args, **kwargs)
 
@@ -22,6 +22,6 @@ registry.filter(localtime_wrapper(time))
 
 
 @registry.function
-@registry.render_with('widgets/relative-time.html')
-def relative_time(time, format=_('N j, Y, g:i a'), rel=_('{time}'), abs=_('on {time}')):
-    return {'time': time, 'format': format, 'rel_format': rel, 'abs_format': abs}
+@registry.render_with("widgets/relative-time.html")
+def relative_time(time, format=_("N j, Y, g:i a"), rel=_("{time}"), abs=_("on {time}")):
+    return {"time": time, "format": format, "rel_format": rel, "abs_format": abs}

judge/jinja2/filesize.py

@@ -13,24 +13,28 @@ def _format_size(bytes, callback):
     PB = 1 << 50
 
     if bytes < KB:
-        return callback('', bytes)
+        return callback("", bytes)
     elif bytes < MB:
-        return callback('K', bytes / KB)
+        return callback("K", bytes / KB)
     elif bytes < GB:
-        return callback('M', bytes / MB)
+        return callback("M", bytes / MB)
     elif bytes < TB:
-        return callback('G', bytes / GB)
+        return callback("G", bytes / GB)
     elif bytes < PB:
-        return callback('T', bytes / TB)
+        return callback("T", bytes / TB)
     else:
-        return callback('P', bytes / PB)
+        return callback("P", bytes / PB)
 
 
 @registry.filter
 def kbdetailformat(bytes):
-    return avoid_wrapping(_format_size(bytes * 1024, lambda x, y: ['%d %sB', '%.2f %sB'][bool(x)] % (y, x)))
+    return avoid_wrapping(
+        _format_size(
+            bytes * 1024, lambda x, y: ["%d %sB", "%.2f %sB"][bool(x)] % (y, x)
+        )
+    )
 
 
 @registry.filter
 def kbsimpleformat(kb):
-    return _format_size(kb * 1024, lambda x, y: '%.0f%s' % (y, x or 'B'))
+    return _format_size(kb * 1024, lambda x, y: "%.0f%s" % (y, x or "B"))

judge/jinja2/gravatar.py

@@ -17,9 +17,13 @@ def gravatar(email, size=80, default=None):
     elif isinstance(email, AbstractUser):
         email = email.email
 
-    gravatar_url = '//www.gravatar.com/avatar/' + hashlib.md5(utf8bytes(email.strip().lower())).hexdigest() + '?'
-    args = {'d': 'identicon', 's': str(size)}
+    gravatar_url = (
+        "//www.gravatar.com/avatar/"
+        + hashlib.md5(utf8bytes(email.strip().lower())).hexdigest()
+        + "?"
+    )
+    args = {"d": "identicon", "s": str(size)}
     if default:
-        args['f'] = 'y'
+        args["f"] = "y"
     gravatar_url += urlencode(args)
     return gravatar_url

judge/jinja2/language.py

@@ -3,7 +3,7 @@ from django.utils import translation
 from . import registry
 
 
-@registry.function('language_info')
+@registry.function("language_info")
 def get_language_info(language):
     # ``language`` is either a language code string or a sequence
     # with the language code as its first item
@@ -13,6 +13,6 @@ def get_language_info(language):
         return translation.get_language_info(str(language))
 
 
-@registry.function('language_info_list')
+@registry.function("language_info_list")
 def get_language_info_list(langs):
     return [get_language_info(lang) for lang in langs]

judge/jinja2/markdown/__init__.py

@@ -12,22 +12,28 @@ from lxml.etree import ParserError, XMLSyntaxError
 from judge.highlight_code import highlight_code
 from judge.jinja2.markdown.lazy_load import lazy_load as lazy_load_processor
 from judge.jinja2.markdown.math import MathInlineGrammar, MathInlineLexer, MathRenderer
-from judge.jinja2.markdown.spoiler import SpoilerInlineGrammar, SpoilerInlineLexer, SpoilerRenderer
+from judge.jinja2.markdown.spoiler import (
+    SpoilerInlineGrammar,
+    SpoilerInlineLexer,
+    SpoilerRenderer,
+)
 from judge.utils.camo import client as camo_client
 from judge.utils.texoid import TEXOID_ENABLED, TexoidRenderer
 from .. import registry
 
-logger = logging.getLogger('judge.html')
+logger = logging.getLogger("judge.html")
 
 NOFOLLOW_WHITELIST = settings.NOFOLLOW_EXCLUDED
 
 
 class CodeSafeInlineGrammar(mistune.InlineGrammar):
-    double_emphasis = re.compile(r'^\*{2}([\s\S]+?)()\*{2}(?!\*)')  # **word**
-    emphasis = re.compile(r'^\*((?:\*\*|[^\*])+?)()\*(?!\*)')  # *word*
+    double_emphasis = re.compile(r"^\*{2}([\s\S]+?)()\*{2}(?!\*)")  # **word**
+    emphasis = re.compile(r"^\*((?:\*\*|[^\*])+?)()\*(?!\*)")  # *word*
 
 
-class AwesomeInlineGrammar(MathInlineGrammar, SpoilerInlineGrammar, CodeSafeInlineGrammar):
+class AwesomeInlineGrammar(
+    MathInlineGrammar, SpoilerInlineGrammar, CodeSafeInlineGrammar
+):
     pass
 
 
@@ -37,8 +43,8 @@ class AwesomeInlineLexer(MathInlineLexer, SpoilerInlineLexer, mistune.InlineLexe
 
 class AwesomeRenderer(MathRenderer, SpoilerRenderer, mistune.Renderer):
     def __init__(self, *args, **kwargs):
-        self.nofollow = kwargs.pop('nofollow', True)
-        self.texoid = TexoidRenderer() if kwargs.pop('texoid', False) else None
+        self.nofollow = kwargs.pop("nofollow", True)
+        self.texoid = TexoidRenderer() if kwargs.pop("texoid", False) else None
         self.parser = HTMLParser()
         super(AwesomeRenderer, self).__init__(*args, **kwargs)
 
@@ -51,18 +57,18 @@ class AwesomeRenderer(MathRenderer, SpoilerRenderer, mistune.Renderer):
             else:
                 if url.netloc and url.netloc not in NOFOLLOW_WHITELIST:
                     return ' rel="nofollow"'
-        return ''
+        return ""
 
     def autolink(self, link, is_email=False):
         text = link = mistune.escape(link)
         if is_email:
-            link = 'mailto:%s' % link
+            link = "mailto:%s" % link
         return '<a href="%s"%s>%s</a>' % (link, self._link_rel(link), text)
 
     def table(self, header, body):
         return (
             '<table class="table">\n<thead>%s</thead>\n'
-            '<tbody>\n%s</tbody>\n</table>\n'
+            "<tbody>\n%s</tbody>\n</table>\n"
         ) % (header, body)
 
     def link(self, link, title, text):
@@ -70,40 +76,53 @@ class AwesomeRenderer(MathRenderer, SpoilerRenderer, mistune.Renderer):
         if not title:
             return '<a href="%s"%s>%s</a>' % (link, self._link_rel(link), text)
         title = mistune.escape(title, quote=True)
-        return '<a href="%s" title="%s"%s>%s</a>' % (link, title, self._link_rel(link), text)
+        return '<a href="%s" title="%s"%s>%s</a>' % (
+            link,
+            title,
+            self._link_rel(link),
+            text,
+        )
 
     def block_code(self, code, lang=None):
         if not lang:
-            return '\n<pre><code>%s</code></pre>\n' % mistune.escape(code).rstrip()
+            return "\n<pre><code>%s</code></pre>\n" % mistune.escape(code).rstrip()
         return highlight_code(code, lang)
 
     def block_html(self, html):
-        if self.texoid and html.startswith('<latex'):
-            attr = html[6:html.index('>')]
-            latex = html[html.index('>') + 1:html.rindex('<')]
+        if self.texoid and html.startswith("<latex"):
+            attr = html[6 : html.index(">")]
+            latex = html[html.index(">") + 1 : html.rindex("<")]
             latex = self.parser.unescape(latex)
             result = self.texoid.get_result(latex)
             if not result:
-                return '<pre>%s</pre>' % mistune.escape(latex, smart_amp=False)
-            elif 'error' not in result:
-                img = ('''<img src="%(svg)s" onerror="this.src='%(png)s';this.onerror=null"'''
-                       'width="%(width)s" height="%(height)s"%(tail)s>') % {
-                    'svg': result['svg'], 'png': result['png'],
-                    'width': result['meta']['width'], 'height': result['meta']['height'],
-                    'tail': ' /' if self.options.get('use_xhtml') else '',
+                return "<pre>%s</pre>" % mistune.escape(latex, smart_amp=False)
+            elif "error" not in result:
+                img = (
+                    '''<img src="%(svg)s" onerror="this.src='%(png)s';this.onerror=null"'''
+                    'width="%(width)s" height="%(height)s"%(tail)s>'
+                ) % {
+                    "svg": result["svg"],
+                    "png": result["png"],
+                    "width": result["meta"]["width"],
+                    "height": result["meta"]["height"],
+                    "tail": " /" if self.options.get("use_xhtml") else "",
                 }
-                style = ['max-width: 100%',
-                         'height: %s' % result['meta']['height'],
-                         'max-height: %s' % result['meta']['height'],
-                         'width: %s' % result['meta']['height']]
-                if 'inline' in attr:
-                    tag = 'span'
+                style = [
+                    "max-width: 100%",
+                    "height: %s" % result["meta"]["height"],
+                    "max-height: %s" % result["meta"]["height"],
+                    "width: %s" % result["meta"]["height"],
+                ]
+                if "inline" in attr:
+                    tag = "span"
                 else:
-                    tag = 'div'
-                    style += ['text-align: center']
-                return '<%s style="%s">%s</%s>' % (tag, ';'.join(style), img, tag)
+                    tag = "div"
+                    style += ["text-align: center"]
+                return '<%s style="%s">%s</%s>' % (tag, ";".join(style), img, tag)
             else:
-                return '<pre>%s</pre>' % mistune.escape(result['error'], smart_amp=False)
+                return "<pre>%s</pre>" % mistune.escape(
+                    result["error"], smart_amp=False
+                )
         return super(AwesomeRenderer, self).block_html(html)
 
     def header(self, text, level, *args, **kwargs):
@@ -113,30 +132,41 @@ class AwesomeRenderer(MathRenderer, SpoilerRenderer, mistune.Renderer):
 @registry.filter
 def markdown(value, style, math_engine=None, lazy_load=False):
     styles = settings.MARKDOWN_STYLES.get(style, settings.MARKDOWN_DEFAULT_STYLE)
-    escape = styles.get('safe_mode', True)
-    nofollow = styles.get('nofollow', True)
-    texoid = TEXOID_ENABLED and styles.get('texoid', False)
-    math = hasattr(settings, 'MATHOID_URL') and styles.get('math', False)
+    escape = styles.get("safe_mode", True)
+    nofollow = styles.get("nofollow", True)
+    texoid = TEXOID_ENABLED and styles.get("texoid", False)
+    math = hasattr(settings, "MATHOID_URL") and styles.get("math", False)
 
     post_processors = []
-    if styles.get('use_camo', False) and camo_client is not None:
+    if styles.get("use_camo", False) and camo_client is not None:
         post_processors.append(camo_client.update_tree)
     if lazy_load:
         post_processors.append(lazy_load_processor)
 
-    renderer = AwesomeRenderer(escape=escape, nofollow=nofollow, texoid=texoid,
-                               math=math and math_engine is not None, math_engine=math_engine)
-    markdown = mistune.Markdown(renderer=renderer, inline=AwesomeInlineLexer,
-                                parse_block_html=1, parse_inline_html=1)
+    renderer = AwesomeRenderer(
+        escape=escape,
+        nofollow=nofollow,
+        texoid=texoid,
+        math=math and math_engine is not None,
+        math_engine=math_engine,
+    )
+    markdown = mistune.Markdown(
+        renderer=renderer,
+        inline=AwesomeInlineLexer,
+        parse_block_html=1,
+        parse_inline_html=1,
+    )
     result = markdown(value)
     if post_processors:
         try:
             tree = html.fromstring(result, parser=html.HTMLParser(recover=True))
         except (XMLSyntaxError, ParserError) as e:
-            if result and (not isinstance(e, ParserError) or e.args[0] != 'Document is empty'):
-                logger.exception('Failed to parse HTML string')
-            tree = html.Element('div')
+            if result and (
+                not isinstance(e, ParserError) or e.args[0] != "Document is empty"
+            ):
+                logger.exception("Failed to parse HTML string")
+            tree = html.Element("div")
         for processor in post_processors:
             processor(tree)
-        result = html.tostring(tree, encoding='unicode')
+        result = html.tostring(tree, encoding="unicode")
     return Markup(result)

judge/jinja2/markdown/lazy_load.py

@@ -5,16 +5,16 @@ from lxml import html
 
 
 def lazy_load(tree):
-    blank = static('blank.gif')
-    for img in tree.xpath('.//img'):
-        src = img.get('src', '')
-        if src.startswith('data') or '-math' in img.get('class', ''):
+    blank = static("blank.gif")
+    for img in tree.xpath(".//img"):
+        src = img.get("src", "")
+        if src.startswith("data") or "-math" in img.get("class", ""):
             continue
-        noscript = html.Element('noscript')
+        noscript = html.Element("noscript")
         copy = deepcopy(img)
-        copy.tail = ''
+        copy.tail = ""
         noscript.append(copy)
         img.addprevious(noscript)
-        img.set('data-src', src)
-        img.set('src', blank)
-        img.set('class', img.get('class') + ' unveil' if img.get('class') else 'unveil')
+        img.set("data-src", src)
+        img.set("src", blank)
+        img.set("class", img.get("class") + " unveil" if img.get("class") else "unveil")

judge/jinja2/markdown/math.py

@@ -6,13 +6,13 @@ from django.conf import settings
 
 from judge.utils.mathoid import MathoidMathParser
 
-mistune._pre_tags.append('latex')
+mistune._pre_tags.append("latex")
 
 
 class MathInlineGrammar(mistune.InlineGrammar):
-    block_math = re.compile(r'^\$\$(.*?)\$\$|^\\\[(.*?)\\\]', re.DOTALL)
-    math = re.compile(r'^~(.*?)~|^\\\((.*?)\\\)', re.DOTALL)
-    text = re.compile(r'^[\s\S]+?(?=[\\<!\[_*`~$]|\\[\[(]|https?://| {2,}\n|$)')
+    block_math = re.compile(r"^\$\$(.*?)\$\$|^\\\[(.*?)\\\]", re.DOTALL)
+    math = re.compile(r"^~(.*?)~|^\\\((.*?)\\\)", re.DOTALL)
+    text = re.compile(r"^[\s\S]+?(?=[\\<!\[_*`~$]|\\[\[(]|https?://| {2,}\n|$)")
 
 
 class MathInlineLexer(mistune.InlineLexer):
@@ -21,8 +21,10 @@ class MathInlineLexer(mistune.InlineLexer):
     def __init__(self, *args, **kwargs):
         self.default_rules = self.default_rules[:]
         self.inline_html_rules = self.default_rules
-        self.default_rules.insert(self.default_rules.index('strikethrough') + 1, 'math')
-        self.default_rules.insert(self.default_rules.index('strikethrough') + 1, 'block_math')
+        self.default_rules.insert(self.default_rules.index("strikethrough") + 1, "math")
+        self.default_rules.insert(
+            self.default_rules.index("strikethrough") + 1, "block_math"
+        )
         super(MathInlineLexer, self).__init__(*args, **kwargs)
 
     def output_block_math(self, m):
@@ -35,14 +37,14 @@ class MathInlineLexer(mistune.InlineLexer):
         tag = m.group(1)
         text = m.group(3)
         if self._parse_inline_html and text:
-            if tag == 'a':
+            if tag == "a":
                 self._in_link = True
                 text = self.output(text)
                 self._in_link = False
             else:
                 text = self.output(text)
-            extra = m.group(2) or ''
-            html = '<%s%s>%s</%s>' % (tag, extra, text, tag)
+            extra = m.group(2) or ""
+            html = "<%s%s>%s</%s>" % (tag, extra, text, tag)
         else:
             html = m.group(0)
         return self.renderer.inline_html(html)
@@ -50,18 +52,18 @@ class MathInlineLexer(mistune.InlineLexer):
 
 class MathRenderer(mistune.Renderer):
     def __init__(self, *args, **kwargs):
-        if kwargs.pop('math', False) and settings.MATHOID_URL != False:
-            self.mathoid = MathoidMathParser(kwargs.pop('math_engine', None) or 'svg')
+        if kwargs.pop("math", False) and settings.MATHOID_URL != False:
+            self.mathoid = MathoidMathParser(kwargs.pop("math_engine", None) or "svg")
         else:
             self.mathoid = None
         super(MathRenderer, self).__init__(*args, **kwargs)
 
     def block_math(self, math):
         if self.mathoid is None or not math:
-            return r'\[%s\]' % mistune.escape(str(math))
+            return r"\[%s\]" % mistune.escape(str(math))
         return self.mathoid.display_math(math)
 
     def math(self, math):
         if self.mathoid is None or not math:
-            return r'\(%s\)' % mistune.escape(str(math))
+            return r"\(%s\)" % mistune.escape(str(math))
         return self.mathoid.inline_math(math)

judge/jinja2/markdown/spoiler.py

@@ -3,14 +3,14 @@ import mistune
 
 
 class SpoilerInlineGrammar(mistune.InlineGrammar):
-    spoiler = re.compile(r'^\|\|(.+?)\s+([\s\S]+?)\s*\|\|')
+    spoiler = re.compile(r"^\|\|(.+?)\s+([\s\S]+?)\s*\|\|")
 
 
 class SpoilerInlineLexer(mistune.InlineLexer):
     grammar_class = SpoilerInlineGrammar
 
     def __init__(self, *args, **kwargs):
-        self.default_rules.insert(0, 'spoiler')
+        self.default_rules.insert(0, "spoiler")
         super(SpoilerInlineLexer, self).__init__(*args, **kwargs)
 
     def output_spoiler(self, m):
@@ -19,9 +19,12 @@ class SpoilerInlineLexer(mistune.InlineLexer):
 
 class SpoilerRenderer(mistune.Renderer):
     def spoiler(self, summary, text):
-        return '''<details>
+        return """<details>
             <summary style="color: brown">
                 <span class="spoiler-summary">%s</span>
             </summary>
             <div class="spoiler-text">%s</div>
-        </details>''' % (summary, text)
+        </details>""" % (
+            summary,
+            text,
+        )

judge/jinja2/rating.py

@@ -14,22 +14,22 @@ def _get_rating_value(func, obj):
         return func(obj.rating)
 
 
-@registry.function('rating_class')
+@registry.function("rating_class")
 def get_rating_class(obj):
-    return _get_rating_value(rating_class, obj) or 'rate-none'
+    return _get_rating_value(rating_class, obj) or "rate-none"
 
 
-@registry.function(name='rating_name')
+@registry.function(name="rating_name")
 def get_name(obj):
-    return _get_rating_value(rating_name, obj) or 'Unrated'
+    return _get_rating_value(rating_name, obj) or "Unrated"
 
 
-@registry.function(name='rating_progress')
+@registry.function(name="rating_progress")
 def get_progress(obj):
     return _get_rating_value(rating_progress, obj) or 0.0
 
 
 @registry.function
-@registry.render_with('user/rating.html')
+@registry.render_with("user/rating.html")
 def rating_number(obj):
-    return {'rating': obj}
+    return {"rating": obj}

judge/jinja2/reference.py

@@ -13,17 +13,17 @@ from judge.models import Contest, Problem, Profile
 from judge.ratings import rating_class, rating_progress
 from . import registry
 
-rereference = re.compile(r'\[(r?user):(\w+)\]')
+rereference = re.compile(r"\[(r?user):(\w+)\]")
 
 
 def get_user(username, data):
     if not data:
-        element = Element('span')
+        element = Element("span")
         element.text = username
         return element
 
-    element = Element('span', {'class': Profile.get_user_css_class(*data)})
-    link = Element('a', {'href': reverse('user_page', args=[username])})
+    element = Element("span", {"class": Profile.get_user_css_class(*data)})
+    link = Element("a", {"href": reverse("user_page", args=[username])})
     link.text = username
     element.append(link)
     return element
@@ -31,17 +31,21 @@ def get_user(username, data):
 
 def get_user_rating(username, data):
     if not data:
-        element = Element('span')
+        element = Element("span")
         element.text = username
         return element
 
     rating = data[1]
-    element = Element('a', {'class': 'rate-group', 'href': reverse('user_page', args=[username])})
+    element = Element(
+        "a", {"class": "rate-group", "href": reverse("user_page", args=[username])}
+    )
     if rating:
         rating_css = rating_class(rating)
-        rate_box = Element('span', {'class': 'rate-box ' + rating_css})
-        rate_box.append(Element('span', {'style': 'height: %3.fem' % rating_progress(rating)}))
-        user = Element('span', {'class': 'rating ' + rating_css})
+        rate_box = Element("span", {"class": "rate-box " + rating_css})
+        rate_box.append(
+            Element("span", {"style": "height: %3.fem" % rating_progress(rating)})
+        )
+        user = Element("span", {"class": "rating " + rating_css})
         user.text = username
         element.append(rate_box)
         element.append(user)
@@ -51,9 +55,12 @@ def get_user_rating(username, data):
 
 
 def get_user_info(usernames):
-    return {name: (rank, rating) for name, rank, rating in
-            Profile.objects.filter(user__username__in=usernames)
-                   .values_list('user__username', 'display_rank', 'rating')}
+    return {
+        name: (rank, rating)
+        for name, rank, rating in Profile.objects.filter(
+            user__username__in=usernames
+        ).values_list("user__username", "display_rank", "rating")
+    }
 
 
 def get_user_from_text(text):
@@ -64,8 +71,8 @@ def get_user_from_text(text):
 
 
 reference_map = {
-    'user': (get_user, get_user_info),
-    'ruser': (get_user_rating, get_user_info),
+    "user": (get_user, get_user_info),
+    "ruser": (get_user_rating, get_user_info),
 }
 
 
@@ -143,52 +150,52 @@ def item_title(item):
         return item.name
     elif isinstance(item, Contest):
         return item.name
-    return '<Unknown>'
+    return "<Unknown>"
 
 
 @registry.function
-@registry.render_with('user/link.html')
+@registry.render_with("user/link.html")
 def link_user(user):
     if isinstance(user, Profile):
         user, profile = user.user, user
     elif isinstance(user, AbstractUser):
         profile = user.profile
-    elif type(user).__name__ == 'ContestRankingProfile':
+    elif type(user).__name__ == "ContestRankingProfile":
         user, profile = user.user, user
     else:
-        raise ValueError('Expected profile or user, got %s' % (type(user),))
-    return {'user': user, 'profile': profile}
+        raise ValueError("Expected profile or user, got %s" % (type(user),))
+    return {"user": user, "profile": profile}
 
 
 @registry.function
-@registry.render_with('user/link-list.html')
+@registry.render_with("user/link-list.html")
 def link_users(users):
-    return {'users': users}
+    return {"users": users}
 
 
 @registry.function
-@registry.render_with('runtime-version-fragment.html')
+@registry.render_with("runtime-version-fragment.html")
 def runtime_versions(versions):
-    return {'runtime_versions': versions}
+    return {"runtime_versions": versions}
 
 
-@registry.filter(name='absolutify')
+@registry.filter(name="absolutify")
 def absolute_links(text, url):
     tree = lxml_tree.fromstring(text)
-    for anchor in tree.xpath('.//a'):
-        href = anchor.get('href')
+    for anchor in tree.xpath(".//a"):
+        href = anchor.get("href")
         if href:
-            anchor.set('href', urljoin(url, href))
+            anchor.set("href", urljoin(url, href))
     return tree
 
 
-@registry.function(name='urljoin')
+@registry.function(name="urljoin")
 def join(first, second, *rest):
     if not rest:
         return urljoin(first, second)
     return urljoin(urljoin(first, second), *rest)
 
 
-@registry.filter(name='ansi2html')
+@registry.filter(name="ansi2html")
 def ansi2html(s):
     return mark_safe(Ansi2HTMLConverter(inline=True).convert(s, full=False))

judge/jinja2/registry.py

@@ -5,7 +5,7 @@ tests = {}
 filters = {}
 extensions = []
 
-__all__ = ['render_with', 'function', 'filter', 'test', 'extension']
+__all__ = ["render_with", "function", "filter", "test", "extension"]
 
 
 def _store_function(store, func, name=None):
@@ -16,6 +16,7 @@ def _store_function(store, func, name=None):
 
 def _register_function(store, name, func):
     if name is None and func is None:
+
         def decorator(func):
             _store_function(store, func)
             return func
@@ -26,6 +27,7 @@ def _register_function(store, name, func):
             _store_function(store, name)
             return name
         else:
+
             def decorator(func):
                 _store_function(store, func, name)
                 return func

judge/jinja2/render.py

@@ -1,5 +1,9 @@
-from django.template import (Context, Template as DjangoTemplate, TemplateSyntaxError as DjangoTemplateSyntaxError,
-                             VariableDoesNotExist)
+from django.template import (
+    Context,
+    Template as DjangoTemplate,
+    TemplateSyntaxError as DjangoTemplateSyntaxError,
+    VariableDoesNotExist,
+)
 
 from . import registry
 
@@ -24,4 +28,4 @@ def render_django(template, **context):
     try:
         return compile_template(template).render(Context(context))
     except (VariableDoesNotExist, DjangoTemplateSyntaxError):
-        return 'Error rendering: %r' % template
+        return "Error rendering: %r" % template

judge/jinja2/social.py

@@ -1,13 +1,29 @@
 from django.template.loader import get_template
 from django.utils.safestring import mark_safe
-from django_social_share.templatetags.social_share import post_to_facebook_url, post_to_gplus_url, post_to_twitter_url
+from django_social_share.templatetags.social_share import (
+    post_to_facebook_url,
+    post_to_gplus_url,
+    post_to_twitter_url,
+)
 
 from . import registry
 
 SHARES = [
-    ('post_to_twitter', 'django_social_share/templatetags/post_to_twitter.html', post_to_twitter_url),
-    ('post_to_facebook', 'django_social_share/templatetags/post_to_facebook.html', post_to_facebook_url),
-    ('post_to_gplus', 'django_social_share/templatetags/post_to_gplus.html', post_to_gplus_url),
+    (
+        "post_to_twitter",
+        "django_social_share/templatetags/post_to_twitter.html",
+        post_to_twitter_url,
+    ),
+    (
+        "post_to_facebook",
+        "django_social_share/templatetags/post_to_facebook.html",
+        post_to_facebook_url,
+    ),
+    (
+        "post_to_gplus",
+        "django_social_share/templatetags/post_to_gplus.html",
+        post_to_gplus_url,
+    ),
     # For future versions:
     # ('post_to_linkedin', 'django_social_share/templatetags/post_to_linkedin.html', post_to_linkedin_url),
     # ('post_to_reddit', 'django_social_share/templatetags/post_to_reddit.html', post_to_reddit_url),
@@ -17,7 +33,7 @@ SHARES = [
 def make_func(name, template, url_func):
     def func(request, *args):
         link_text = args[-1]
-        context = {'request': request, 'link_text': mark_safe(link_text)}
+        context = {"request": request, "link_text": mark_safe(link_text)}
         context = url_func(context, *args[:-1])
         return mark_safe(get_template(template).render(context))
 
@@ -31,4 +47,6 @@ for name, template, url_func in SHARES:
 
 @registry.function
 def recaptcha_init(language=None):
-    return get_template('snowpenguin/recaptcha/recaptcha_init.html').render({'explicit': False, 'language': language})
+    return get_template("snowpenguin/recaptcha/recaptcha_init.html").render(
+        {"explicit": False, "language": language}
+    )

judge/jinja2/spaceless.py

@@ -15,15 +15,17 @@ class SpacelessExtension(Extension):
         https://stackoverflow.com/a/23741298/1090657
     """
 
-    tags = {'spaceless'}
+    tags = {"spaceless"}
 
     def parse(self, parser):
         lineno = next(parser.stream).lineno
-        body = parser.parse_statements(['name:endspaceless'], drop_needle=True)
+        body = parser.parse_statements(["name:endspaceless"], drop_needle=True)
         return nodes.CallBlock(
-            self.call_method('_strip_spaces', [], [], None, None),
-            [], [], body,
+            self.call_method("_strip_spaces", [], [], None, None),
+            [],
+            [],
+            body,
         ).set_lineno(lineno)
 
     def _strip_spaces(self, caller=None):
-        return Markup(re.sub(r'>\s+<', '><', caller().unescape().strip()))
+        return Markup(re.sub(r">\s+<", "><", caller().unescape().strip()))

judge/jinja2/submission.py

@@ -2,7 +2,9 @@ from . import registry
 
 
 @registry.function
-def submission_layout(submission, profile_id, user, editable_problem_ids, completed_problem_ids):
+def submission_layout(
+    submission, profile_id, user, editable_problem_ids, completed_problem_ids
+):
     problem_id = submission.problem_id
     can_view = False
 
@@ -12,13 +14,15 @@ def submission_layout(submission, profile_id, user, editable_problem_ids, comple
     if profile_id == submission.user_id:
         can_view = True
 
-    if user.has_perm('judge.change_submission'):
+    if user.has_perm("judge.change_submission"):
         can_view = True
 
     if submission.problem_id in completed_problem_ids:
-        can_view |= submission.problem.is_public or profile_id in submission.problem.tester_ids
+        can_view |= (
+            submission.problem.is_public or profile_id in submission.problem.tester_ids
+        )
 
-    if not can_view and hasattr(submission, 'contest'):
+    if not can_view and hasattr(submission, "contest"):
         contest = submission.contest.participation.contest
         if contest.is_editable_by(user):
             can_view = True

judge/jinja2/timedelta.py

@@ -5,14 +5,14 @@ from . import registry
 
 
 @registry.filter
-def timedelta(value, display='long'):
+def timedelta(value, display="long"):
     if value is None:
         return value
     return nice_repr(value, display)
 
 
 @registry.filter
-def timestampdelta(value, display='long'):
+def timestampdelta(value, display="long"):
     value = datetime.timedelta(seconds=value)
     return timedelta(value, display)
 
@@ -23,8 +23,8 @@ def seconds(timedelta):
 
 
 @registry.filter
-@registry.render_with('time-remaining-fragment.html')
+@registry.render_with("time-remaining-fragment.html")
 def as_countdown(time):
     time_now = datetime.datetime.now(datetime.timezone.utc)
     initial = abs(time - time_now)
-    return {'countdown': time, 'initial': initial}
+    return {"countdown": time, "initial": initial}

judge/judgeapi.py

@@ -8,43 +8,51 @@ from django.conf import settings
 
 from judge import event_poster as event
 
-logger = logging.getLogger('judge.judgeapi')
-size_pack = struct.Struct('!I')
+logger = logging.getLogger("judge.judgeapi")
+size_pack = struct.Struct("!I")
 
 
 def _post_update_submission(submission, done=False):
     if submission.problem.is_public:
-        event.post('submissions', {'type': 'done-submission' if done else 'update-submission',
-                                   'id': submission.id,
-                                   'contest': submission.contest_key,
-                                   'user': submission.user_id, 'problem': submission.problem_id,
-                                   'status': submission.status, 'language': submission.language.key})
+        event.post(
+            "submissions",
+            {
+                "type": "done-submission" if done else "update-submission",
+                "id": submission.id,
+                "contest": submission.contest_key,
+                "user": submission.user_id,
+                "problem": submission.problem_id,
+                "status": submission.status,
+                "language": submission.language.key,
+            },
+        )
 
 
 def judge_request(packet, reply=True):
-    sock = socket.create_connection(settings.BRIDGED_DJANGO_CONNECT or
-                                    settings.BRIDGED_DJANGO_ADDRESS[0])
+    sock = socket.create_connection(
+        settings.BRIDGED_DJANGO_CONNECT or settings.BRIDGED_DJANGO_ADDRESS[0]
+    )
 
-    output = json.dumps(packet, separators=(',', ':'))
-    output = zlib.compress(output.encode('utf-8'))
-    writer = sock.makefile('wb')
+    output = json.dumps(packet, separators=(",", ":"))
+    output = zlib.compress(output.encode("utf-8"))
+    writer = sock.makefile("wb")
     writer.write(size_pack.pack(len(output)))
     writer.write(output)
     writer.close()
 
     if reply:
-        reader = sock.makefile('rb', -1)
+        reader = sock.makefile("rb", -1)
         input = reader.read(size_pack.size)
         if not input:
-            raise ValueError('Judge did not respond')
+            raise ValueError("Judge did not respond")
         length = size_pack.unpack(input)[0]
         input = reader.read(length)
         if not input:
-            raise ValueError('Judge did not respond')
+            raise ValueError("Judge did not respond")
         reader.close()
         sock.close()
 
-        result = json.loads(zlib.decompress(input).decode('utf-8'))
+        result = json.loads(zlib.decompress(input).decode("utf-8"))
         return result
 
 
@@ -56,13 +64,23 @@ def judge_submission(submission, rejudge=False, batch_rejudge=False, judge_id=No
     REJUDGE_PRIORITY = 2
     BATCH_REJUDGE_PRIORITY = 3
 
-    updates = {'time': None, 'memory': None, 'points': None, 'result': None, 'error': None,
-               'was_rejudged': rejudge, 'status': 'QU'}
+    updates = {
+        "time": None,
+        "memory": None,
+        "points": None,
+        "result": None,
+        "error": None,
+        "was_rejudged": rejudge,
+        "status": "QU",
+    }
     try:
         # This is set proactively; it might get unset in judgecallback's on_grading_begin if the problem doesn't
         # actually have pretests stored on the judge.
-        updates['is_pretested'] = all(ContestSubmission.objects.filter(submission=submission)
-                                      .values_list('problem__contest__run_pretests_only', 'problem__is_pretested')[0])
+        updates["is_pretested"] = all(
+            ContestSubmission.objects.filter(submission=submission).values_list(
+                "problem__contest__run_pretests_only", "problem__is_pretested"
+            )[0]
+        )
     except IndexError:
         priority = DEFAULT_PRIORITY
     else:
@@ -76,43 +94,65 @@ def judge_submission(submission, rejudge=False, batch_rejudge=False, judge_id=No
     # as that would prevent people from knowing a submission is being scheduled for rejudging.
     # It is worth noting that this mechanism does not prevent a new rejudge from being scheduled
     # while already queued, but that does not lead to data corruption.
-    if not Submission.objects.filter(id=submission.id).exclude(status__in=('P', 'G')).update(**updates):
+    if (
+        not Submission.objects.filter(id=submission.id)
+        .exclude(status__in=("P", "G"))
+        .update(**updates)
+    ):
         return False
 
     SubmissionTestCase.objects.filter(submission_id=submission.id).delete()
 
     try:
-        response = judge_request({
-            'name': 'submission-request',
-            'submission-id': submission.id,
-            'problem-id': submission.problem.code,
-            'language': submission.language.key,
-            'source': submission.source.source,
-            'judge-id': judge_id,
-            'priority': BATCH_REJUDGE_PRIORITY if batch_rejudge else REJUDGE_PRIORITY if rejudge else priority,
-        })
+        response = judge_request(
+            {
+                "name": "submission-request",
+                "submission-id": submission.id,
+                "problem-id": submission.problem.code,
+                "language": submission.language.key,
+                "source": submission.source.source,
+                "judge-id": judge_id,
+                "priority": BATCH_REJUDGE_PRIORITY
+                if batch_rejudge
+                else REJUDGE_PRIORITY
+                if rejudge
+                else priority,
+            }
+        )
     except BaseException:
-        logger.exception('Failed to send request to judge')
-        Submission.objects.filter(id=submission.id).update(status='IE', result='IE')
+        logger.exception("Failed to send request to judge")
+        Submission.objects.filter(id=submission.id).update(status="IE", result="IE")
         success = False
     else:
-        if response['name'] != 'submission-received' or response['submission-id'] != submission.id:
-            Submission.objects.filter(id=submission.id).update(status='IE', result='IE')
+        if (
+            response["name"] != "submission-received"
+            or response["submission-id"] != submission.id
+        ):
+            Submission.objects.filter(id=submission.id).update(status="IE", result="IE")
         _post_update_submission(submission)
         success = True
     return success
 
 
 def disconnect_judge(judge, force=False):
-    judge_request({'name': 'disconnect-judge', 'judge-id': judge.name, 'force': force}, reply=False)
+    judge_request(
+        {"name": "disconnect-judge", "judge-id": judge.name, "force": force},
+        reply=False,
+    )
 
 
 def abort_submission(submission):
     from .models import Submission
-    response = judge_request({'name': 'terminate-submission', 'submission-id': submission.id})
+
+    response = judge_request(
+        {"name": "terminate-submission", "submission-id": submission.id}
+    )
     # This defaults to true, so that in the case the JudgeList fails to remove the submission from the queue,
     # and returns a bad-request, the submission is not falsely shown as "Aborted" when it will still be judged.
-    if not response.get('judge-aborted', True):
-        Submission.objects.filter(id=submission.id).update(status='AB', result='AB')
-        event.post('sub_%s' % Submission.get_id_secret(submission.id), {'type': 'aborted-submission'})
+    if not response.get("judge-aborted", True):
+        Submission.objects.filter(id=submission.id).update(status="AB", result="AB")
+        event.post(
+            "sub_%s" % Submission.get_id_secret(submission.id),
+            {"type": "aborted-submission"},
+        )
         _post_update_submission(submission, done=True)

judge/lxml_tree.py

@@ -4,7 +4,7 @@ from django.utils.safestring import SafeData, mark_safe
 from lxml import html
 from lxml.etree import ParserError, XMLSyntaxError
 
-logger = logging.getLogger('judge.html')
+logger = logging.getLogger("judge.html")
 
 
 class HTMLTreeString(SafeData):
@@ -12,9 +12,11 @@ class HTMLTreeString(SafeData):
         try:
             self._tree = html.fromstring(str, parser=html.HTMLParser(recover=True))
         except (XMLSyntaxError, ParserError) as e:
-            if str and (not isinstance(e, ParserError) or e.args[0] != 'Document is empty'):
-                logger.exception('Failed to parse HTML string')
-            self._tree = html.Element('div')
+            if str and (
+                not isinstance(e, ParserError) or e.args[0] != "Document is empty"
+            ):
+                logger.exception("Failed to parse HTML string")
+            self._tree = html.Element("div")
 
     def __getattr__(self, attr):
         try:
@@ -23,15 +25,15 @@ class HTMLTreeString(SafeData):
             return getattr(str(self), attr)
 
     def __setattr__(self, key, value):
-        if key[0] == '_':
+        if key[0] == "_":
             super(HTMLTreeString, self).__setattr__(key, value)
         setattr(self._tree, key, value)
 
     def __repr__(self):
-        return '<HTMLTreeString %r>' % str(self)
+        return "<HTMLTreeString %r>" % str(self)
 
     def __str__(self):
-        return mark_safe(html.tostring(self._tree, encoding='unicode'))
+        return mark_safe(html.tostring(self._tree, encoding="unicode"))
 
     def __radd__(self, other):
         return other + str(self)

judge/management/commands/addjudge.py

@@ -4,15 +4,14 @@ from judge.models import Judge
 
 
 class Command(BaseCommand):
-    help = 'create a judge'
+    help = "create a judge"
 
     def add_arguments(self, parser):
-        parser.add_argument('name', help='the name of the judge')
-        parser.add_argument('auth_key', help='authentication key for the judge')
+        parser.add_argument("name", help="the name of the judge")
+        parser.add_argument("auth_key", help="authentication key for the judge")
 
     def handle(self, *args, **options):
         judge = Judge()
-        judge.name = options['name']
-        judge.auth_key = options['auth_key']
+        judge.name = options["name"]
+        judge.auth_key = options["auth_key"]
         judge.save()
-

judge/management/commands/adduser.py

@@ -6,27 +6,39 @@ from judge.models import Language, Profile
 
 
 class Command(BaseCommand):
-    help = 'creates a user'
+    help = "creates a user"
 
     def add_arguments(self, parser):
-        parser.add_argument('name', help='username')
-        parser.add_argument('email', help='email, not necessary to be resolvable')
-        parser.add_argument('password', help='password for the user')
-        parser.add_argument('language', nargs='?', default=settings.DEFAULT_USER_LANGUAGE,
-                            help='default language ID for user')
+        parser.add_argument("name", help="username")
+        parser.add_argument("email", help="email, not necessary to be resolvable")
+        parser.add_argument("password", help="password for the user")
+        parser.add_argument(
+            "language",
+            nargs="?",
+            default=settings.DEFAULT_USER_LANGUAGE,
+            help="default language ID for user",
+        )
 
-        parser.add_argument('--superuser', action='store_true', default=False,
-                            help="if specified, creates user with superuser privileges")
-        parser.add_argument('--staff', action='store_true', default=False,
-                            help="if specified, creates user with staff privileges")
+        parser.add_argument(
+            "--superuser",
+            action="store_true",
+            default=False,
+            help="if specified, creates user with superuser privileges",
+        )
+        parser.add_argument(
+            "--staff",
+            action="store_true",
+            default=False,
+            help="if specified, creates user with staff privileges",
+        )
 
     def handle(self, *args, **options):
-        usr = User(username=options['name'], email=options['email'], is_active=True)
-        usr.set_password(options['password'])
-        usr.is_superuser = options['superuser']
-        usr.is_staff = options['staff']
+        usr = User(username=options["name"], email=options["email"], is_active=True)
+        usr.set_password(options["password"])
+        usr.is_superuser = options["superuser"]
+        usr.is_staff = options["staff"]
         usr.save()
 
         profile = Profile(user=usr)
-        profile.language = Language.objects.get(key=options['language'])
+        profile.language = Language.objects.get(key=options["language"])
         profile.save()

judge/management/commands/camo.py

@@ -4,13 +4,13 @@ from judge.utils.camo import client as camo_client
 
 
 class Command(BaseCommand):
-    help = 'obtains the camo url for the specified url'
+    help = "obtains the camo url for the specified url"
 
     def add_arguments(self, parser):
-        parser.add_argument('url', help='url to use camo on')
+        parser.add_argument("url", help="url to use camo on")
 
     def handle(self, *args, **options):
         if camo_client is None:
-            raise CommandError('Camo not available')
+            raise CommandError("Camo not available")
 
-        print(camo_client.image_url(options['url']))
+        print(camo_client.image_url(options["url"]))

judge/management/commands/copy_language.py

@@ -4,24 +4,30 @@ from judge.models import Language, LanguageLimit
 
 
 class Command(BaseCommand):
-    help = 'allows the problems that allow <source> to be submitted in <target>'
+    help = "allows the problems that allow <source> to be submitted in <target>"
 
     def add_arguments(self, parser):
-        parser.add_argument('source', help='language to copy from')
-        parser.add_argument('target', help='language to copy to')
+        parser.add_argument("source", help="language to copy from")
+        parser.add_argument("target", help="language to copy to")
 
     def handle(self, *args, **options):
         try:
-            source = Language.objects.get(key=options['source'])
+            source = Language.objects.get(key=options["source"])
         except Language.DoesNotExist:
-            raise CommandError('Invalid source language: %s' % options['source'])
+            raise CommandError("Invalid source language: %s" % options["source"])
 
         try:
-            target = Language.objects.get(key=options['target'])
+            target = Language.objects.get(key=options["target"])
         except Language.DoesNotExist:
-            raise CommandError('Invalid target language: %s' % options['target'])
+            raise CommandError("Invalid target language: %s" % options["target"])
 
         target.problem_set.set(source.problem_set.all())
-        LanguageLimit.objects.bulk_create(LanguageLimit(problem=ll.problem, language=target, time_limit=ll.time_limit,
-                                                        memory_limit=ll.memory_limit)
-                                          for ll in LanguageLimit.objects.filter(language=source))
+        LanguageLimit.objects.bulk_create(
+            LanguageLimit(
+                problem=ll.problem,
+                language=target,
+                time_limit=ll.time_limit,
+                memory_limit=ll.memory_limit,
+            )
+            for ll in LanguageLimit.objects.filter(language=source)
+        )

judge/management/commands/create_problem.py

@@ -4,20 +4,20 @@ from judge.models import Problem, ProblemGroup, ProblemType
 
 
 class Command(BaseCommand):
-    help = 'create an empty problem'
+    help = "create an empty problem"
 
     def add_arguments(self, parser):
-        parser.add_argument('code', help='problem code')
-        parser.add_argument('name', help='problem title')
-        parser.add_argument('body', help='problem description')
-        parser.add_argument('type', help='problem type')
-        parser.add_argument('group', help='problem group')
+        parser.add_argument("code", help="problem code")
+        parser.add_argument("name", help="problem title")
+        parser.add_argument("body", help="problem description")
+        parser.add_argument("type", help="problem type")
+        parser.add_argument("group", help="problem group")
 
     def handle(self, *args, **options):
         problem = Problem()
-        problem.code = options['code']
-        problem.name = options['name']
-        problem.description = options['body']
-        problem.group = ProblemGroup.objects.get(name=options['group'])
-        problem.types = [ProblemType.objects.get(name=options['type'])]
+        problem.code = options["code"]
+        problem.name = options["name"]
+        problem.description = options["body"]
+        problem.group = ProblemGroup.objects.get(name=options["group"])
+        problem.types = [ProblemType.objects.get(name=options["type"])]
         problem.save()

judge/management/commands/generate_data.py

@@ -7,41 +7,45 @@ from django.conf import settings
 
 
 def gen_submissions():
-    headers = ['uid', 'pid']
-    with open(os.path.join(settings.ML_DATA_PATH, 'submissions.csv'), 'w') as csvfile:
+    headers = ["uid", "pid"]
+    with open(os.path.join(settings.ML_DATA_PATH, "submissions.csv"), "w") as csvfile:
         f = csv.writer(csvfile)
         f.writerow(headers)
 
         last_pid = defaultdict(int)
         for u in Profile.objects.all():
             used = set()
-            print('Processing user', u.id)
-            for s in Submission.objects.filter(user=u).order_by('-date'):
+            print("Processing user", u.id)
+            for s in Submission.objects.filter(user=u).order_by("-date"):
                 if s.problem.id not in used:
                     used.add(s.problem.id)
                     f.writerow([u.id, s.problem.id])
 
+
 def gen_users():
-    headers = ['uid', 'username', 'rating', 'points']
-    with open(os.path.join(settings.ML_DATA_PATH, 'profiles.csv'), 'w') as csvfile:
+    headers = ["uid", "username", "rating", "points"]
+    with open(os.path.join(settings.ML_DATA_PATH, "profiles.csv"), "w") as csvfile:
         f = csv.writer(csvfile)
         f.writerow(headers)
 
         for u in Profile.objects.all():
             f.writerow([u.id, u.username, u.rating, u.performance_points])
 
+
 def gen_problems():
-    headers = ['pid', 'code', 'name', 'points', 'url']
-    with open(os.path.join(settings.ML_DATA_PATH, 'problems.csv'), 'w') as csvfile:
+    headers = ["pid", "code", "name", "points", "url"]
+    with open(os.path.join(settings.ML_DATA_PATH, "problems.csv"), "w") as csvfile:
         f = csv.writer(csvfile)
         f.writerow(headers)
 
         for p in Problem.objects.all():
-            f.writerow([p.id, p.code, p.name, p.points, 'lqdoj.edu.vn/problem/' + p.code])
+            f.writerow(
+                [p.id, p.code, p.name, p.points, "lqdoj.edu.vn/problem/" + p.code]
+            )
 
 
 class Command(BaseCommand):
-    help = 'generate data for ML'
+    help = "generate data for ML"
 
     def handle(self, *args, **options):
         gen_users()

judge/management/commands/makedmojmessages.py

@@ -5,33 +5,69 @@ import sys
 
 from django.conf import settings
 from django.core.management import CommandError
-from django.core.management.commands.makemessages import Command as MakeMessagesCommand, check_programs
+from django.core.management.commands.makemessages import (
+    Command as MakeMessagesCommand,
+    check_programs,
+)
 
 from judge.models import NavigationBar, ProblemType
 
 
 class Command(MakeMessagesCommand):
     def add_arguments(self, parser):
-        parser.add_argument('--locale', '-l', default=[], dest='locale', action='append',
-                            help='Creates or updates the message files for the given locale(s) (e.g. pt_BR). '
-                                 'Can be used multiple times.')
-        parser.add_argument('--exclude', '-x', default=[], dest='exclude', action='append',
-                            help='Locales to exclude. Default is none. Can be used multiple times.')
-        parser.add_argument('--all', '-a', action='store_true', dest='all',
-                            default=False, help='Updates the message files for all existing locales.')
-        parser.add_argument('--no-wrap', action='store_true', dest='no_wrap',
-                            default=False, help="Don't break long message lines into several lines.")
-        parser.add_argument('--no-obsolete', action='store_true', dest='no_obsolete',
-                            default=False, help="Remove obsolete message strings.")
-        parser.add_argument('--keep-pot', action='store_true', dest='keep_pot',
-                            default=False, help="Keep .pot file after making messages. Useful when debugging.")
+        parser.add_argument(
+            "--locale",
+            "-l",
+            default=[],
+            dest="locale",
+            action="append",
+            help="Creates or updates the message files for the given locale(s) (e.g. pt_BR). "
+            "Can be used multiple times.",
+        )
+        parser.add_argument(
+            "--exclude",
+            "-x",
+            default=[],
+            dest="exclude",
+            action="append",
+            help="Locales to exclude. Default is none. Can be used multiple times.",
+        )
+        parser.add_argument(
+            "--all",
+            "-a",
+            action="store_true",
+            dest="all",
+            default=False,
+            help="Updates the message files for all existing locales.",
+        )
+        parser.add_argument(
+            "--no-wrap",
+            action="store_true",
+            dest="no_wrap",
+            default=False,
+            help="Don't break long message lines into several lines.",
+        )
+        parser.add_argument(
+            "--no-obsolete",
+            action="store_true",
+            dest="no_obsolete",
+            default=False,
+            help="Remove obsolete message strings.",
+        )
+        parser.add_argument(
+            "--keep-pot",
+            action="store_true",
+            dest="keep_pot",
+            default=False,
+            help="Keep .pot file after making messages. Useful when debugging.",
+        )
 
     def handle(self, *args, **options):
-        locale = options.get('locale')
-        exclude = options.get('exclude')
-        self.domain = 'dmoj-user'
-        self.verbosity = options.get('verbosity')
-        process_all = options.get('all')
+        locale = options.get("locale")
+        exclude = options.get("exclude")
+        self.domain = "dmoj-user"
+        self.verbosity = options.get("verbosity")
+        process_all = options.get("all")
 
         # Need to ensure that the i18n framework is enabled
         if settings.configured:
@@ -40,43 +76,47 @@ class Command(MakeMessagesCommand):
             settings.configure(USE_I18N=True)
 
         # Avoid messing with mutable class variables
-        if options.get('no_wrap'):
-            self.msgmerge_options = self.msgmerge_options[:] + ['--no-wrap']
-            self.msguniq_options = self.msguniq_options[:] + ['--no-wrap']
-            self.msgattrib_options = self.msgattrib_options[:] + ['--no-wrap']
-            self.xgettext_options = self.xgettext_options[:] + ['--no-wrap']
-        if options.get('no_location'):
-            self.msgmerge_options = self.msgmerge_options[:] + ['--no-location']
-            self.msguniq_options = self.msguniq_options[:] + ['--no-location']
-            self.msgattrib_options = self.msgattrib_options[:] + ['--no-location']
-            self.xgettext_options = self.xgettext_options[:] + ['--no-location']
+        if options.get("no_wrap"):
+            self.msgmerge_options = self.msgmerge_options[:] + ["--no-wrap"]
+            self.msguniq_options = self.msguniq_options[:] + ["--no-wrap"]
+            self.msgattrib_options = self.msgattrib_options[:] + ["--no-wrap"]
+            self.xgettext_options = self.xgettext_options[:] + ["--no-wrap"]
+        if options.get("no_location"):
+            self.msgmerge_options = self.msgmerge_options[:] + ["--no-location"]
+            self.msguniq_options = self.msguniq_options[:] + ["--no-location"]
+            self.msgattrib_options = self.msgattrib_options[:] + ["--no-location"]
+            self.xgettext_options = self.xgettext_options[:] + ["--no-location"]
 
-        self.no_obsolete = options.get('no_obsolete')
-        self.keep_pot = options.get('keep_pot')
+        self.no_obsolete = options.get("no_obsolete")
+        self.keep_pot = options.get("keep_pot")
 
         if locale is None and not exclude and not process_all:
-            raise CommandError("Type '%s help %s' for usage information." % (
-                os.path.basename(sys.argv[0]), sys.argv[1]))
+            raise CommandError(
+                "Type '%s help %s' for usage information."
+                % (os.path.basename(sys.argv[0]), sys.argv[1])
+            )
 
         self.invoked_for_django = False
         self.locale_paths = []
         self.default_locale_path = None
-        if os.path.isdir(os.path.join('conf', 'locale')):
-            self.locale_paths = [os.path.abspath(os.path.join('conf', 'locale'))]
+        if os.path.isdir(os.path.join("conf", "locale")):
+            self.locale_paths = [os.path.abspath(os.path.join("conf", "locale"))]
             self.default_locale_path = self.locale_paths[0]
             self.invoked_for_django = True
         else:
             self.locale_paths.extend(settings.LOCALE_PATHS)
             # Allow to run makemessages inside an app dir
-            if os.path.isdir('locale'):
-                self.locale_paths.append(os.path.abspath('locale'))
+            if os.path.isdir("locale"):
+                self.locale_paths.append(os.path.abspath("locale"))
             if self.locale_paths:
                 self.default_locale_path = self.locale_paths[0]
                 if not os.path.exists(self.default_locale_path):
                     os.makedirs(self.default_locale_path)
 
         # Build locale list
-        locale_dirs = list(filter(os.path.isdir, glob.glob('%s/*' % self.default_locale_path)))
+        locale_dirs = list(
+            filter(os.path.isdir, glob.glob("%s/*" % self.default_locale_path))
+        )
         all_locales = list(map(os.path.basename, locale_dirs))
 
         # Account for excluded locales
@@ -87,9 +127,9 @@ class Command(MakeMessagesCommand):
             locales = set(locales) - set(exclude)
 
         if locales:
-            check_programs('msguniq', 'msgmerge', 'msgattrib')
+            check_programs("msguniq", "msgmerge", "msgattrib")
 
-        check_programs('xgettext')
+        check_programs("xgettext")
 
         try:
             potfiles = self.build_potfiles()
@@ -108,23 +148,33 @@ class Command(MakeMessagesCommand):
         return []
 
     def _emit_message(self, potfile, string):
-        potfile.write('''
+        potfile.write(
+            """
 msgid "%s"
 msgstr ""
-''' % string.replace('\\', r'\\').replace('\t', '\\t').replace('\n', '\\n').replace('"', '\\"'))
+"""
+            % string.replace("\\", r"\\")
+            .replace("\t", "\\t")
+            .replace("\n", "\\n")
+            .replace('"', '\\"')
+        )
 
     def process_files(self, file_list):
-        with io.open(os.path.join(self.default_locale_path, 'dmoj-user.pot'), 'w', encoding='utf-8') as potfile:
+        with io.open(
+            os.path.join(self.default_locale_path, "dmoj-user.pot"),
+            "w",
+            encoding="utf-8",
+        ) as potfile:
             if self.verbosity > 1:
-                self.stdout.write('processing navigation bar')
-            for label in NavigationBar.objects.values_list('label', flat=True):
+                self.stdout.write("processing navigation bar")
+            for label in NavigationBar.objects.values_list("label", flat=True):
                 if self.verbosity > 2:
                     self.stdout.write('processing navigation item label "%s"\n' % label)
                 self._emit_message(potfile, label)
 
             if self.verbosity > 1:
-                self.stdout.write('processing problem types')
-            for name in ProblemType.objects.values_list('full_name', flat=True):
+                self.stdout.write("processing problem types")
+            for name in ProblemType.objects.values_list("full_name", flat=True):
                 if self.verbosity > 2:
                     self.stdout.write('processing problem type name "%s"\n' % name)
                 self._emit_message(potfile, name)

judge/management/commands/render_pdf.py

@@ -8,52 +8,98 @@ from django.template.loader import get_template
 from django.utils import translation
 
 from judge.models import Problem, ProblemTranslation
-from judge.pdf_problems import DefaultPdfMaker, PhantomJSPdfMaker, PuppeteerPDFRender, SeleniumPDFRender, \
-    SlimerJSPdfMaker
+from judge.pdf_problems import (
+    DefaultPdfMaker,
+    PhantomJSPdfMaker,
+    PuppeteerPDFRender,
+    SeleniumPDFRender,
+    SlimerJSPdfMaker,
+)
+
 
 class Command(BaseCommand):
-    help = 'renders a PDF file of a problem'
+    help = "renders a PDF file of a problem"
 
     def add_arguments(self, parser):
-        parser.add_argument('code', help='code of problem to render')
-        parser.add_argument('directory', nargs='?', help='directory to store temporaries')
-        parser.add_argument('-l', '--language', default=settings.LANGUAGE_CODE,
-                            help='language to render PDF in')
-        parser.add_argument('-p', '--phantomjs', action='store_const', const=PhantomJSPdfMaker,
-                            default=DefaultPdfMaker, dest='engine')
-        parser.add_argument('-s', '--slimerjs', action='store_const', const=SlimerJSPdfMaker, dest='engine')
-        parser.add_argument('-c', '--chrome', '--puppeteer', action='store_const',
-                            const=PuppeteerPDFRender, dest='engine')
-        parser.add_argument('-S', '--selenium', action='store_const', const=SeleniumPDFRender, dest='engine')
+        parser.add_argument("code", help="code of problem to render")
+        parser.add_argument(
+            "directory", nargs="?", help="directory to store temporaries"
+        )
+        parser.add_argument(
+            "-l",
+            "--language",
+            default=settings.LANGUAGE_CODE,
+            help="language to render PDF in",
+        )
+        parser.add_argument(
+            "-p",
+            "--phantomjs",
+            action="store_const",
+            const=PhantomJSPdfMaker,
+            default=DefaultPdfMaker,
+            dest="engine",
+        )
+        parser.add_argument(
+            "-s",
+            "--slimerjs",
+            action="store_const",
+            const=SlimerJSPdfMaker,
+            dest="engine",
+        )
+        parser.add_argument(
+            "-c",
+            "--chrome",
+            "--puppeteer",
+            action="store_const",
+            const=PuppeteerPDFRender,
+            dest="engine",
+        )
+        parser.add_argument(
+            "-S",
+            "--selenium",
+            action="store_const",
+            const=SeleniumPDFRender,
+            dest="engine",
+        )
 
     def handle(self, *args, **options):
         try:
-            problem = Problem.objects.get(code=options['code'])
+            problem = Problem.objects.get(code=options["code"])
         except Problem.DoesNotExist:
-            print('Bad problem code')
+            print("Bad problem code")
             return
 
         try:
-            trans = problem.translations.get(language=options['language'])
+            trans = problem.translations.get(language=options["language"])
         except ProblemTranslation.DoesNotExist:
             trans = None
 
-        directory = options['directory']
-        with options['engine'](directory, clean_up=directory is None) as maker, \
-                translation.override(options['language']):
+        directory = options["directory"]
+        with options["engine"](
+            directory, clean_up=directory is None
+        ) as maker, translation.override(options["language"]):
             problem_name = problem.name if trans is None else trans.name
-            maker.html = get_template('problem/raw.html').render({
-                'problem': problem,
-                'problem_name': problem_name,
-                'description': problem.description if trans is None else trans.description,
-                'url': '',
-                'math_engine': maker.math_engine,
-            }).replace('"//', '"https://').replace("'//", "'https://")
+            maker.html = (
+                get_template("problem/raw.html")
+                .render(
+                    {
+                        "problem": problem,
+                        "problem_name": problem_name,
+                        "description": problem.description
+                        if trans is None
+                        else trans.description,
+                        "url": "",
+                        "math_engine": maker.math_engine,
+                    }
+                )
+                .replace('"//', '"https://')
+                .replace("'//", "'https://")
+            )
             maker.title = problem_name
-            for file in ('style.css', 'pygment-github.css', 'mathjax_config.js'):
+            for file in ("style.css", "pygment-github.css", "mathjax_config.js"):
                 maker.load(file, os.path.join(settings.DMOJ_RESOURCES, file))
             maker.make(debug=True)
             if not maker.success:
                 print(maker.log, file=sys.stderr)
             elif directory is None:
-                shutil.move(maker.pdffile, problem.code + '.pdf')
+                shutil.move(maker.pdffile, problem.code + ".pdf")

judge/management/commands/runmoss.py

@@ -6,42 +6,50 @@ from judge.models import Contest, ContestParticipation, Submission
 
 
 class Command(BaseCommand):
-    help = 'Checks for duplicate code using MOSS'
+    help = "Checks for duplicate code using MOSS"
 
     LANG_MAPPING = {
-        ('C++', MOSS_LANG_CC),
-        ('C', MOSS_LANG_C),
-        ('Java', MOSS_LANG_JAVA),
-        ('Python', MOSS_LANG_PYTHON),
-        ('Pascal', MOSS_LANG_PASCAL),
+        ("C++", MOSS_LANG_CC),
+        ("C", MOSS_LANG_C),
+        ("Java", MOSS_LANG_JAVA),
+        ("Python", MOSS_LANG_PYTHON),
+        ("Pascal", MOSS_LANG_PASCAL),
     }
 
     def add_arguments(self, parser):
-        parser.add_argument('contest', help='the id of the contest')
+        parser.add_argument("contest", help="the id of the contest")
 
     def handle(self, *args, **options):
         moss_api_key = settings.MOSS_API_KEY
         if moss_api_key is None:
-            print('No MOSS API Key supplied')
+            print("No MOSS API Key supplied")
             return
-        contest = options['contest']
+        contest = options["contest"]
 
-        for problem in Contest.objects.get(key=contest).problems.order_by('code'):
-            print('========== %s / %s ==========' % (problem.code, problem.name))
+        for problem in Contest.objects.get(key=contest).problems.order_by("code"):
+            print("========== %s / %s ==========" % (problem.code, problem.name))
             for dmoj_lang, moss_lang in self.LANG_MAPPING:
-                print("%s: " % dmoj_lang, end=' ')
+                print("%s: " % dmoj_lang, end=" ")
                 subs = Submission.objects.filter(
-                    contest__participation__virtual__in=(ContestParticipation.LIVE, ContestParticipation.SPECTATE),
+                    contest__participation__virtual__in=(
+                        ContestParticipation.LIVE,
+                        ContestParticipation.SPECTATE,
+                    ),
                     contest__participation__contest__key=contest,
-                    result='AC', problem__id=problem.id,
+                    result="AC",
+                    problem__id=problem.id,
                     language__common_name=dmoj_lang,
-                ).values_list('user__user__username', 'source__source')
+                ).values_list("user__user__username", "source__source")
                 if not subs:
-                    print('<no submissions>')
+                    print("<no submissions>")
                     continue
 
-                moss_call = MOSS(moss_api_key, language=moss_lang, matching_file_limit=100,
-                                 comment='%s - %s' % (contest, problem.code))
+                moss_call = MOSS(
+                    moss_api_key,
+                    language=moss_lang,
+                    matching_file_limit=100,
+                    comment="%s - %s" % (contest, problem.code),
+                )
 
                 users = set()
 
@@ -49,6 +57,6 @@ class Command(BaseCommand):
                     if username in users:
                         continue
                     users.add(username)
-                    moss_call.add_file_from_memory(username, source.encode('utf-8'))
+                    moss_call.add_file_from_memory(username, source.encode("utf-8"))
 
-                print('(%d): %s' % (subs.count(), moss_call.process()))
+                print("(%d): %s" % (subs.count(), moss_call.process()))

judge/middleware.py

@@ -10,11 +10,13 @@ class ShortCircuitMiddleware:
 
     def __call__(self, request):
         try:
-            callback, args, kwargs = resolve(request.path_info, getattr(request, 'urlconf', None))
+            callback, args, kwargs = resolve(
+                request.path_info, getattr(request, "urlconf", None)
+            )
         except Resolver404:
             callback, args, kwargs = None, None, None
 
-        if getattr(callback, 'short_circuit_middleware', False):
+        if getattr(callback, "short_circuit_middleware", False):
             return callback(request, *args, **kwargs)
         return self.get_response(request)
 
@@ -26,11 +28,16 @@ class DMOJLoginMiddleware(object):
     def __call__(self, request):
         if request.user.is_authenticated:
             profile = request.profile = request.user.profile
-            login_2fa_path = reverse('login_2fa')
-            if (profile.is_totp_enabled and not request.session.get('2fa_passed', False) and
-                    request.path not in (login_2fa_path, reverse('auth_logout')) and
-                    not request.path.startswith(settings.STATIC_URL)):
-                return HttpResponseRedirect(login_2fa_path + '?next=' + urlquote(request.get_full_path()))
+            login_2fa_path = reverse("login_2fa")
+            if (
+                profile.is_totp_enabled
+                and not request.session.get("2fa_passed", False)
+                and request.path not in (login_2fa_path, reverse("auth_logout"))
+                and not request.path.startswith(settings.STATIC_URL)
+            ):
+                return HttpResponseRedirect(
+                    login_2fa_path + "?next=" + urlquote(request.get_full_path())
+                )
         else:
             request.profile = None
         return self.get_response(request)
@@ -57,7 +64,7 @@ class ContestMiddleware(object):
             profile.update_contest()
             request.participation = profile.current_contest
             request.in_contest = request.participation is not None
-            request.contest_mode = request.session.get('contest_mode', True)
+            request.contest_mode = request.session.get("contest_mode", True)
         else:
             request.in_contest = False
             request.participation = None

judge/migrations/0085_submission_source.py

@@ -7,33 +7,61 @@ from django.db import migrations, models
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('judge', '0084_contest_formats'),
+        ("judge", "0084_contest_formats"),
     ]
 
     operations = [
         migrations.CreateModel(
-            name='SubmissionSource',
+            name="SubmissionSource",
             fields=[
-                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('source', models.TextField(max_length=65536, verbose_name='source code')),
-                ('submission', models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, related_name='link', to='judge.Submission', verbose_name='associated submission')),
+                (
+                    "id",
+                    models.AutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                (
+                    "source",
+                    models.TextField(max_length=65536, verbose_name="source code"),
+                ),
+                (
+                    "submission",
+                    models.OneToOneField(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="link",
+                        to="judge.Submission",
+                        verbose_name="associated submission",
+                    ),
+                ),
             ],
         ),
         migrations.RunSQL(
-            ['''INSERT INTO judge_submissionsource (source, submission_id)
-                SELECT source, id AS 'submission_id' FROM judge_submission;'''],
-            ['''UPDATE judge_submission sub
+            [
+                """INSERT INTO judge_submissionsource (source, submission_id)
+                SELECT source, id AS 'submission_id' FROM judge_submission;"""
+            ],
+            [
+                """UPDATE judge_submission sub
                 INNER JOIN judge_submissionsource src ON sub.id = src.submission_id
-                SET sub.source = src.source;'''],
+                SET sub.source = src.source;"""
+            ],
             elidable=True,
         ),
         migrations.RemoveField(
-            model_name='submission',
-            name='source',
+            model_name="submission",
+            name="source",
         ),
         migrations.AlterField(
-            model_name='submissionsource',
-            name='submission',
-            field=models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, related_name='source', to='judge.Submission', verbose_name='associated submission'),
+            model_name="submissionsource",
+            name="submission",
+            field=models.OneToOneField(
+                on_delete=django.db.models.deletion.CASCADE,
+                related_name="source",
+                to="judge.Submission",
+                verbose_name="associated submission",
+            ),
         ),
     ]

judge/migrations/0086_rating_ceiling.py

@@ -6,18 +6,28 @@ from django.db import migrations, models
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('judge', '0085_submission_source'),
+        ("judge", "0085_submission_source"),
     ]
 
     operations = [
         migrations.AddField(
-            model_name='contest',
-            name='rating_ceiling',
-            field=models.IntegerField(blank=True, help_text='Rating ceiling for contest', null=True, verbose_name='rating ceiling'),
+            model_name="contest",
+            name="rating_ceiling",
+            field=models.IntegerField(
+                blank=True,
+                help_text="Rating ceiling for contest",
+                null=True,
+                verbose_name="rating ceiling",
+            ),
         ),
         migrations.AddField(
-            model_name='contest',
-            name='rating_floor',
-            field=models.IntegerField(blank=True, help_text='Rating floor for contest', null=True, verbose_name='rating floor'),
+            model_name="contest",
+            name="rating_floor",
+            field=models.IntegerField(
+                blank=True,
+                help_text="Rating floor for contest",
+                null=True,
+                verbose_name="rating floor",
+            ),
         ),
     ]

judge/migrations/0087_problem_resource_limits.py

@@ -7,18 +7,28 @@ from django.db import migrations, models
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('judge', '0086_rating_ceiling'),
+        ("judge", "0086_rating_ceiling"),
     ]
 
     operations = [
         migrations.AlterField(
-            model_name='problem',
-            name='memory_limit',
-            field=models.PositiveIntegerField(help_text='The memory limit for this problem, in kilobytes (e.g. 64mb = 65536 kilobytes).', verbose_name='memory limit'),
+            model_name="problem",
+            name="memory_limit",
+            field=models.PositiveIntegerField(
+                help_text="The memory limit for this problem, in kilobytes (e.g. 64mb = 65536 kilobytes).",
+                verbose_name="memory limit",
+            ),
         ),
         migrations.AlterField(
-            model_name='problem',
-            name='time_limit',
-            field=models.FloatField(help_text='The time limit for this problem, in seconds. Fractional seconds (e.g. 1.5) are supported.', validators=[django.core.validators.MinValueValidator(0), django.core.validators.MaxValueValidator(2000)], verbose_name='time limit'),
+            model_name="problem",
+            name="time_limit",
+            field=models.FloatField(
+                help_text="The time limit for this problem, in seconds. Fractional seconds (e.g. 1.5) are supported.",
+                validators=[
+                    django.core.validators.MinValueValidator(0),
+                    django.core.validators.MaxValueValidator(2000),
+                ],
+                verbose_name="time limit",
+            ),
         ),
     ]

judge/migrations/0088_private_contests.py

@@ -6,32 +6,53 @@ from django.db import migrations, models
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('judge', '0087_problem_resource_limits'),
+        ("judge", "0087_problem_resource_limits"),
     ]
 
     operations = [
         migrations.AlterModelOptions(
-            name='contest',
-            options={'permissions': (('see_private_contest', 'See private contests'), ('edit_own_contest', 'Edit own contests'), ('edit_all_contest', 'Edit all contests'), ('contest_rating', 'Rate contests'), ('contest_access_code', 'Contest access codes'), ('create_private_contest', 'Create private contests')), 'verbose_name': 'contest', 'verbose_name_plural': 'contests'},
+            name="contest",
+            options={
+                "permissions": (
+                    ("see_private_contest", "See private contests"),
+                    ("edit_own_contest", "Edit own contests"),
+                    ("edit_all_contest", "Edit all contests"),
+                    ("contest_rating", "Rate contests"),
+                    ("contest_access_code", "Contest access codes"),
+                    ("create_private_contest", "Create private contests"),
+                ),
+                "verbose_name": "contest",
+                "verbose_name_plural": "contests",
+            },
         ),
         migrations.RenameField(
-            model_name='contest',
-            old_name='is_public',
-            new_name='is_visible',
+            model_name="contest",
+            old_name="is_public",
+            new_name="is_visible",
         ),
         migrations.AddField(
-            model_name='contest',
-            name='is_organization_private',
-            field=models.BooleanField(default=False, verbose_name='private to organizations'),
+            model_name="contest",
+            name="is_organization_private",
+            field=models.BooleanField(
+                default=False, verbose_name="private to organizations"
+            ),
         ),
         migrations.AddField(
-            model_name='contest',
-            name='private_contestants',
-            field=models.ManyToManyField(blank=True, help_text='If private, only these users may see the contest', related_name='_contest_private_contestants_+', to='judge.Profile', verbose_name='private contestants'),
+            model_name="contest",
+            name="private_contestants",
+            field=models.ManyToManyField(
+                blank=True,
+                help_text="If private, only these users may see the contest",
+                related_name="_contest_private_contestants_+",
+                to="judge.Profile",
+                verbose_name="private contestants",
+            ),
         ),
         migrations.AlterField(
-            model_name='contest',
-            name='is_private',
-            field=models.BooleanField(default=False, verbose_name='private to specific users'),
+            model_name="contest",
+            name="is_private",
+            field=models.BooleanField(
+                default=False, verbose_name="private to specific users"
+            ),
         ),
     ]

judge/migrations/0089_submission_to_contest.py

@@ -7,21 +7,31 @@ from django.db import migrations, models
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('judge', '0088_private_contests'),
+        ("judge", "0088_private_contests"),
     ]
 
     operations = [
         migrations.AddField(
-            model_name='submission',
-            name='contest_object',
-            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='+', to='judge.Contest', verbose_name='contest'),
+            model_name="submission",
+            name="contest_object",
+            field=models.ForeignKey(
+                blank=True,
+                null=True,
+                on_delete=django.db.models.deletion.SET_NULL,
+                related_name="+",
+                to="judge.Contest",
+                verbose_name="contest",
             ),
-        migrations.RunSQL('''
+        ),
+        migrations.RunSQL(
+            """
             UPDATE `judge_submission`
                 INNER JOIN `judge_contestsubmission`
                     ON (`judge_submission`.`id` = `judge_contestsubmission`.`submission_id`)
                 INNER JOIN `judge_contestparticipation`
                     ON (`judge_contestsubmission`.`participation_id` = `judge_contestparticipation`.`id`)
             SET `judge_submission`.`contest_object_id` = `judge_contestparticipation`.`contest_id`
-        ''', migrations.RunSQL.noop),
+        """,
+            migrations.RunSQL.noop,
+        ),
     ]

judge/migrations/0090_fix_contest_visibility.py

@@ -4,16 +4,19 @@ from django.db import migrations
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('judge', '0089_submission_to_contest'),
+        ("judge", "0089_submission_to_contest"),
     ]
 
     operations = [
-        migrations.RunSQL('''
+        migrations.RunSQL(
+            """
             UPDATE `judge_contest`
             SET `judge_contest`.`is_private` = 0, `judge_contest`.`is_organization_private` = 1
             WHERE `judge_contest`.`is_private` = 1
-        ''', '''
+        """,
+            """
             UPDATE `judge_contest`
             SET `judge_contest`.`is_private` = `judge_contest`.`is_organization_private`
-        '''),
+        """,
+        ),
     ]

judge/migrations/0091_compiler_message_ansi2html.py

@@ -5,17 +5,17 @@ from lxml.html.clean import clean_html
 
 
 def strip_error_html(apps, schema_editor):
-    Submission = apps.get_model('judge', 'Submission')
+    Submission = apps.get_model("judge", "Submission")
     for sub in Submission.objects.filter(error__isnull=False).iterator():
         if sub.error:
             sub.error = clean_html(lh.fromstring(sub.error)).text_content()
-            sub.save(update_fields=['error'])
+            sub.save(update_fields=["error"])
 
 
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('judge', '0090_fix_contest_visibility'),
+        ("judge", "0090_fix_contest_visibility"),
     ]
 
     operations = [