Resolve flake8 warnings

src/pretix/plugins/banktransfer/urls.py

@@ -1,9 +1,9 @@
 from django.conf.urls import url
 
-from .views import *
+from . import views
 
 
 urlpatterns = [
-    url(r'^control/event/(?P<organizer>[^/]+)/(?P<event>[^/]+)/banktransfer/import/', ImportView.as_view(),
+    url(r'^control/event/(?P<organizer>[^/]+)/(?P<event>[^/]+)/banktransfer/import/', views.ImportView.as_view(),
         name='import'),
 ]