  from django.http import HttpResponse
  from django.template import RequestContext, loader
  from django import forms
  
  from djangorestframework.response import NoContent, ResponseException
  from djangorestframework.utils import dict2xml, url_resolves
  from djangorestframework.markdownwrapper import apply_markdown
  from djangorestframework.breadcrumbs import get_breadcrumbs
  from djangorestframework.description import get_name, get_description
  from djangorestframework import status
 
</s> remove from django.http import HttpResponse
 </s> add  </s> remove from djangorestframework.response import ResponseException
 </s> add from djangorestframework.response import ErrorResponse </s> remove from djangorestframework.response import Response, ResponseException
 </s> add from djangorestframework.response import Response, ErrorResponse </s> remove from djangorestframework.emitters import EmitterMixin
from djangorestframework.response import Response, ResponseException
from djangorestframework.request import RequestMixin, AuthMixin
 </s> add from djangorestframework.response import Response, ErrorResponse
from djangorestframework.mixins import RequestMixin, ResponseMixin, AuthMixin </s> remove from djangorestframework.emitters import EmitterMixin, BaseEmitter
 </s> add from djangorestframework.emitters import BaseEmitter
from djangorestframework.mixins import ResponseMixin
from djangorestframework.response import ErrorResponse
  from django.http import HttpResponse
  from django.template import RequestContext, loader
  from django import forms
  
from djangorestframework.response import ErrorResponse
  from djangorestframework.utils import dict2xml, url_resolves
  from djangorestframework.markdownwrapper import apply_markdown
  from djangorestframework.breadcrumbs import get_breadcrumbs
  from djangorestframework.description import get_name, get_description
  from djangorestframework import status
keep keep keep keep replace keep keep keep keep keep
 Rename mixins into Mixin class, rename ResponseException to ErrorResponse, remove NoContent 
djangorestframework/emitters.py