Paginator der besser ins Design passt.

membership/views.py

@@ -9,7 +9,6 @@ from django.contrib.auth import get_user_model
 
 from mahjong_ranking.models import KyuDanRanking, LadderRanking, LadderSeason
 from utils import mixins
-
 from . import forms, models
 
 
@@ -49,7 +48,8 @@ class ActivateRegistration(generic.DetailView):
 
     def login(self, user):
         backend = auth.get_backends()[0]
-        user.backend = "%s.%s" % (backend.__module__, backend.__class__.__name__)  # @IgnorePep8
+        user.backend = "%s.%s" % (
+        backend.__module__, backend.__class__.__name__)  # @IgnorePep8
         auth.login(self.request, user)
         messages.success(self.request, _('Activation successful. \
         You can now login anytime with you username and password.'))
@@ -81,7 +81,8 @@ class MembershipDetail(mixins.LoginRequiredMixin, generic.DetailView):
 
     def get_object(self, queryset=None):
         if self.kwargs.get('username'):
-            user = get_object_or_404(get_user_model(), username=self.kwargs['username'])
+            user = get_object_or_404(get_user_model(),
+                                     username=self.kwargs['username'])
             return models.Membership.objects.get_or_create(user=user)[0]
         elif self.request.user.is_authenticated():
             return models.Membership.objects.get(user=self.request.user)