Resolve flake8 warnings

src/pretix/plugins/banktransfer/__init__.py

@@ -23,7 +23,7 @@ class BankTransferApp(AppConfig):
     def compatibility_warnings(self):
         errs = []
         try:
-            import chardet
+            import chardet  # NOQA
         except ImportError:
             errs.append(_("Install the python package 'chardet' for better CSV import capabilities."))
         return errs

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'),
 ]

src/pretix/plugins/banktransfer/views.py

@@ -3,8 +3,8 @@ from decimal import Decimal
 import json
 import logging
 import re
+
 from django.contrib import messages
-from django.core.urlresolvers import reverse
 from django.shortcuts import redirect, render
 from django.utils.timezone import now
 from django.views.generic import TemplateView