  
      _ACCEPT_QUERY_PARAM = api_settings.URL_ACCEPT_OVERRIDE
      _IGNORE_IE_ACCEPT_HEADER = True
  
      def __init__(self, content=None, status=None, headers=None, view=None, request=None, renderers=None):
          # First argument taken by `SimpleTemplateResponse.__init__` is template_name,
          # which we don't need
          super(Response, self).__init__(None, status=status)
  
          self.raw_content = content
 
</s> remove     def finalize_response(self, request, response, *args, **kargs):
 </s> add     def finalize_response(self, request, response, *args, **kwargs):
    def __init__(self, content=None, status=None, headers=None, view=None,
                 request=None, renderers=None, format=None):
  
      _ACCEPT_QUERY_PARAM = api_settings.URL_ACCEPT_OVERRIDE
      _IGNORE_IE_ACCEPT_HEADER = True
  
    def __init__(self, content=None, status=None, headers=None, view=None,
                 request=None, renderers=None, format=None):
          # First argument taken by `SimpleTemplateResponse.__init__` is template_name,
          # which we don't need
          super(Response, self).__init__(None, status=status)
  
          self.raw_content = content
keep keep keep keep replace keep keep keep keep keep
 Basic support for format suffixes 
djangorestframework/response.py