code: def test_roundtrip_simple_py_derived():
      p = SimplePyDerived()
      p.num = 202
      p.stored_in_dict = 303
      data = pickle.dumps(p, pickle.HIGHEST_PROTOCOL)
      p2 = pickle.loads(data)
      assert isinstance(p2, SimplePyDerived)
      assert p2.num == 202
      assert p2.stored_in_dict == 303
  
file_path: coremltools/deps/pybind11/tests/test_pickling.py
imports: import pickle
  import re
  import pytest
  import env
  from pybind11_tests import pickling
label_desc: Use image node_id 5 for calling a global function with example usage: test_roundtrip_simple_py_derived() without return types