  import inspect
  import pickle
  import re
  from collections import ChainMap
  from collections.abc import Mapping
  
  import pytest
  from django.db import models
  
 
</s>
import sys
  import inspect
  import pickle
  import re
import sys
  from collections import ChainMap
  from collections.abc import Mapping
  
  import pytest
  from django.db import models
  
keep keep add keep keep keep keep keep keep
 Allow type checkers to make serializers generic (#7385)
tests/test_serializer.py