  import warnings
  
  from django.utils import six
  from django.utils.encoding import smart_text
  from django.core.exceptions import PermissionDenied
  from django.views.decorators.csrf import csrf_exempt
  from django.utils.translation import ugettext_lazy as _
 
</s> remove from django.utils.translation import ugettext_lazy as _
 </s> add from django.core.exceptions import PermissionDenied </s> remove from django.core.exceptions import PermissionDenied
from django.http import Http404
 </s> add import inspect
import warnings
 </s> remove from rest_framework.compat import HttpResponseBase, View, set_rollback
 </s> add  </s> remove from django.core.exceptions import ObjectDoesNotExist
from django.core.exceptions import ValidationError as DjangoValidationError
from django.core.validators import RegexValidator, ip_address_validators
from django.forms import ImageField as DjangoImageField
 </s> add 
from django.http import Http404
  import warnings
  
  from django.utils import six
from django.http import Http404
  from django.utils.encoding import smart_text
  from django.core.exceptions import PermissionDenied
  from django.views.decorators.csrf import csrf_exempt
  from django.utils.translation import ugettext_lazy as _
keep keep add keep keep keep keep
 Cleanup import following PEP 8 style guide 
rest_framework/views.py