fix all pylint complaints

marietje/songs/views.py

@@ -1,5 +1,5 @@
 from django.shortcuts import render, get_object_or_404, redirect
-from django.contrib.auth.decorators import login_required, permission_required
+from django.contrib.auth.decorators import login_required
 from .models import Song
 
 
@@ -14,8 +14,8 @@ def manage(request):
 
 
 @login_required
-def edit(request, id):
-    song = get_object_or_404(Song, pk=id, user=request.user)
+def edit(request, song_id):
+    song = get_object_or_404(Song, pk=song_id, user=request.user)
     if not request.POST:
         return render(request, 'songs/edit.html', {'song': song})