diff --git a/classes.py b/classes.py
index 4346b37..cc35064 100644
--- a/classes.py
+++ b/classes.py
@@ -1,8 +1,11 @@
+"""File that combines classes"""
+
 class Article:
+    """Class symbolizing an article"""
     def __init__(self, template, title, category="uncategorized"):
         self.template = template
         self.title = title
-        self.category = "uncategorized" if category == None else category
+        self.category = "uncategorized" if category is None else category
 
     def __repr__(self):
-        return f'Article(title="{self.title}")'
\ No newline at end of file
+        return f'Article(title="{self.title}")'
diff --git a/main.py b/main.py
index 9ade4c0..31bd9d1 100644
--- a/main.py
+++ b/main.py
@@ -36,7 +36,7 @@ for article_data in articles_data:
 
     if article.template in articles.keys():
         raise KeyError(f"Two articles linking to the same template ({article.template})")
-    
+
     articles[article.template] = article
     category_list.append(article)
     categories[category_name] = category_list
@@ -49,10 +49,12 @@ for article_data in articles_data:
 @app.route("/")
 @app.route("/p")
 def index():
+    """Homepage"""
     return render_template("home.html", categories=categories.items())
 
 @app.route("/rss")
 def rss_feed():
+    """RSS feed"""
     pretty = request.args.get("pretty", False, type=bool)
     response = make_response(fg.rss_str(pretty=pretty), 200)
     response.mimetype = "application/xml"
@@ -60,6 +62,7 @@ def rss_feed():
 
 @app.route("/atom")
 def atom_feed():
+    """Atom feed"""
     pretty = request.args.get("pretty", False, type=bool)
     response = make_response(fg.atom_str(pretty=pretty), 200)
     response.mimetype = "application/xml"
@@ -71,10 +74,12 @@ def favicon():
 
 @app.route("/contact")
 def contact():
+    """Contact page"""
     return render_template("contact.html")
 
 @app.route("/p/<article_id>/")
 def article(article_id:str):
+    """Render an article"""
     if not re.match(r'[a-zA-Z0-9-]+', article_id):
         return ">:("
     article = articles[article_id]
diff --git a/routes/editor.py b/routes/editor.py
index 8568695..2e6d602 100644
--- a/routes/editor.py
+++ b/routes/editor.py
@@ -1,5 +1,7 @@
-from flask import Blueprint, request, render_template
+"""Used for editor/editor's preview"""
+
 import base64
+from flask import Blueprint, request, render_template
 
 editor_routes = Blueprint('simple_page', __name__, template_folder='templates')
 
@@ -10,9 +12,10 @@ def editor():
 @editor_routes.route("/preview/<b64>")
 @editor_routes.route("/preview/")
 def preview(b64:str=""):
+    """Return a preview to show in the editor"""
     is_real_preview = request.args.get("website", False, type=bool)
     content = base64.b64decode(b64).decode("utf-8")
     if is_real_preview:
         return render_template("editor/demo.html", written=content)
-    else:
-        return render_template("editor/preview.html", content=content)
\ No newline at end of file
+
+    return render_template("editor/preview.html", content=content)