Diverse Code Cleanups

*Code wurde PEP-8 gerecht formatiert
* Kleine Fehler die der PyCharm Inspector beanstandet wurden korrigiert

membership/views.py

@@ -4,16 +4,17 @@ from django.contrib import auth, messages
 from django.core.urlresolvers import reverse
 from django.utils.translation import ugettext as _
 from django.views import generic
+
 from mahjong_ranking.models import KyuDanRanking, LadderRanking, LadderSeason
-import forms
-import models
 from utils import mixins
 
+from . import forms, models
+
 
 class ActivateRegistration(generic.DetailView):
-    '''
+    """
     Activates the Registration of an User and logs him in
-    '''
+    """
     template_name = 'membership/activation_error.html'
 
     def get(self, request, **kwargs):
@@ -79,7 +80,7 @@ class MembershipDetail(mixins.LoginRequiredMixin, generic.DetailView):
 
     def get_object(self, queryset=None):
         if self.kwargs.get('username'):
-            return models.Membership.objects.get(username=self.kwargs['username'])
+            return models.Membership.objects.get_or_create(username=self.kwargs['username'])[0]
         elif self.request.user.is_authenticated():
             return models.Membership.objects.get(user=self.request.user)
 
@@ -88,13 +89,13 @@ class MembershipDetail(mixins.LoginRequiredMixin, generic.DetailView):
         try:
             context['kyu_dan_ranking'] = KyuDanRanking.objects.get(
                 user_id=self.object.user_id)
-        except:
+        except KyuDanRanking.DoesNotExist:
             context['kyu_dan_ranking'] = None
         try:
             context['ladder_ranking'] = LadderRanking.objects.get(
                 user_id=self.object.user_id,
                 season=LadderSeason.objects.current())
-        except:
+        except LadderRanking.DoesNotExist:
             context['ladder_ranking'] = LadderRanking(user=self.object.user)
         return context