      """
  
      def __init__(self, *args, **kwargs):
          self.serializer = kwargs.pop('serializer')
          super(ReturnList, self).__init__(*args, **kwargs)
  
      def __repr__(self):
          return list.__repr__(self)
  
      def __reduce__(self):
 
</s> remove         super(ReturnDict, self).__init__(*args, **kwargs)
 </s> add         super().__init__(*args, **kwargs) </s> remove             super(RequestsClient, self).__init__(*args, **kwargs)
 </s> add             super().__init__(*args, **kwargs) </s> remove             return super(CoreAPIClient, self).__init__(*args, **kwargs)
 </s> add             return super().__init__(*args, **kwargs) </s> remove         super(_UnvalidatedField, self).__init__(*args, **kwargs)
 </s> add         super().__init__(*args, **kwargs) </s> remove         super(SchemaView, self).__init__(*args, **kwargs)
 </s> add         super().__init__(*args, **kwargs)
        super().__init__(*args, **kwargs)
      """
  
      def __init__(self, *args, **kwargs):
          self.serializer = kwargs.pop('serializer')
        super().__init__(*args, **kwargs)
  
      def __repr__(self):
          return list.__repr__(self)
  
      def __reduce__(self):
keep keep keep keep replace keep keep keep keep keep
 Dropped Python 2 compatibility. (#6615)

Thanks to Jon Dufresne (@jdufresne) for review.

Co-authored-by: Asif Saif Uddin <auvipy@gmail.com>
Co-authored-by: Rizwan Mansuri <Rizwan@webbyfox.com> 
rest_framework/utils/serializer_helpers.py