  """
  Provides an APIView class that is the base of all views in REST framework.
  """
  from __future__ import unicode_literals
  from django.core.exceptions import PermissionDenied
  from django.http import Http404
  from django.utils import six
  from django.utils.encoding import smart_text
  from django.utils.translation import ugettext_lazy as _
  from django.views.decorators.csrf import csrf_exempt
  from rest_framework import status, exceptions
 
</s> remove from django.utils.translation import ugettext_lazy as _
 </s> add from django.core.exceptions import PermissionDenied </s> remove from rest_framework.compat import HttpResponseBase, View, set_rollback
 </s> add  </s> remove from django.core.exceptions import PermissionDenied
 </s> add 
import inspect
import warnings

  """
  Provides an APIView class that is the base of all views in REST framework.
  """
  from __future__ import unicode_literals
import inspect
import warnings

import inspect
import warnings

  from django.utils import six
  from django.utils.encoding import smart_text
  from django.utils.translation import ugettext_lazy as _
  from django.views.decorators.csrf import csrf_exempt
  from rest_framework import status, exceptions
keep keep keep keep replace replace keep keep keep keep keep
 Cleanup import following PEP 8 style guide 
rest_framework/views.py