Fixed all pep8 warnings

controllers/web/user.py

@@ -28,7 +28,7 @@ def login():
     error = None
 
     # No user found
-    if user == None:
+    if user is None:
         error = "No user found with the username " + request.form['username']
         flash(error)
         return redirect("/login")
@@ -57,7 +57,7 @@ def signup():
     database = UserController()
 
     # User already exists
-    if database.read(request.form['username']) != None:
+    if database.read(request.form['username']) is not None:
         error = "User, " + request.form['username'] + " already exists"
         flash(error)
         return redirect("/signup")