code is now clean but still not working

passbook/admin/views/applications.py

@@ -1,17 +1,20 @@
 """passbook application administration"""
 
-from django.views.generic import CreateView, DeleteView, ListView, UpdateView
+from django.views.generic import CreateView, ListView
 
 from passbook.admin.mixins import AdminRequiredMixin
 from passbook.core.models import Application
 
 
 class ApplicationListView(AdminRequiredMixin, ListView):
+    """List all applications"""
+
     model = Application
     template_name = 'administration/application/list.html'
 
 
 class ApplicationCreateView(AdminRequiredMixin, CreateView):
+    """Create new application"""
 
     model = Application
     template_name = 'administration/application/create.html'