fixed testcases

rest_framework/views.py

@@ -5,17 +5,17 @@ from __future__ import unicode_literals
 
 import sys
 
+from django.conf import settings
 from django.core.exceptions import PermissionDenied
 from django.db import models
 from django.http import Http404
-from django.http.response import HttpResponseBase, HttpResponse
+from django.http.response import HttpResponse, HttpResponseBase
 from django.utils import six
 from django.utils.encoding import smart_text
 from django.utils.translation import ugettext_lazy as _
+from django.views import debug
 from django.views.decorators.csrf import csrf_exempt
 from django.views.generic import View
-from django.views import debug
-from django.conf import settings
 
 from rest_framework import exceptions, status
 from rest_framework.compat import set_rollback