  which allows mixin classes to be composed in interesting ways.
  """
  from __future__ import unicode_literals
  
  from django.core.exceptions import ValidationError
  from django.http import Http404
  from rest_framework import status
  from rest_framework.response import Response
  from rest_framework.request import clone_request
  from rest_framework.settings import api_settings
 
</s> remove         super(ChoiceField, self).__init__(*args, **kwargs)
 </s> add         super(ChoiceField, self).__init__(**kwargs) </s> remove                 files = request.FILES
 </s> add                 # files = request.FILES </s> remove     def __init__(self, *args, **kwargs):
 </s> add     def __init__(self, **kwargs): </s> remove     def __init__(self, *args, **kwargs):
 </s> add     def __init__(self, **kwargs):
  which allows mixin classes to be composed in interesting ways.
  """
  from __future__ import unicode_literals
  

  from django.http import Http404
  from rest_framework import status
  from rest_framework.response import Response
  from rest_framework.request import clone_request
  from rest_framework.settings import api_settings
keep keep keep keep replace keep keep keep keep keep
 Add relations and get tests running 
rest_framework/mixins.py