fix: pylint

main.py

@@ -1,15 +1,18 @@
+import json
+import re
+import os
 from flask import Flask, render_template, request, send_file, make_response
-from routes.editor import editor_routes
 from feedgen.feed import FeedGenerator
 from dotenv import load_dotenv
+from routes.editor import editor_routes
 from classes import *
-import json, re, os
 load_dotenv()
 
 app = Flask(__name__)
 app.register_blueprint(editor_routes)
 
-articles_data = json.load(open("articles.json", "r", encoding="utf-8"))
+with open("articles.json", "r", encoding="utf-8") as f:
+    articles_data = json.load(f)
 categories = {} # Category name:str -> [Article]
 articles = {} # ID:str = Article
 
@@ -23,7 +26,6 @@ fg.description("Blog RSS feed")
 
 for article_data in articles_data:
     category_name = article_data.get("category", "Uncategorized")
-    
     category_list = categories.get(category_name, [])
 
     article = Article(
@@ -32,7 +34,7 @@ for article_data in articles_data:
         category=category_name
     )
 
-    if article.template in list(articles.keys()):
+    if article.template in articles.keys():
         raise KeyError(f"Two articles linking to the same template ({article.template})")
     
     articles[article.template] = article