  from djangorestframework.renderers import BaseRenderer
  from djangorestframework.resources import Resource, FormResource, ModelResource
  from djangorestframework.response import Response, ErrorResponse
  from djangorestframework.request import request_class_factory
  from djangorestframework.utils import as_tuple, MSIE_USER_AGENT_REGEX
  from djangorestframework.utils.mediatypes import is_form_media_type, order_by_precedence
  
  
  __all__ = (
      # Base behavior mixins
      'RequestMixin',
 
</s> remove from django.http import HttpResponse
 </s> add  </s> remove __all__ = ('Response', 'ErrorResponse')
 </s> add from djangorestframework.utils.mediatypes import order_by_precedence
from djangorestframework.utils import MSIE_USER_AGENT_REGEX
from djangorestframework import status
 </s> remove from djangorestframework.compat import RequestFactory, unittest
 </s> add from djangorestframework.compat import RequestFactory
from djangorestframework.utils import as_tuple, allowed_methods
  from djangorestframework.renderers import BaseRenderer
  from djangorestframework.resources import Resource, FormResource, ModelResource
  from djangorestframework.response import Response, ErrorResponse
  from djangorestframework.request import request_class_factory
from djangorestframework.utils import as_tuple, allowed_methods
from djangorestframework.utils import as_tuple, allowed_methods
  
  
  __all__ = (
      # Base behavior mixins
      'RequestMixin',
keep keep keep keep replace replace keep keep keep keep keep
 Response as a subclass of HttpResponse - first draft, not quite there yet. 
djangorestframework/mixins.py