code: def test_simple(self):
      for src in [
          c_int(42),
          c_double(3.14),
      ]:
          dst = self.loads(self.dumps(src))
          self.assertEqual(src.__dict__, dst.__dict__)
          self.assertEqual(
              memoryview(src).tobytes(), memoryview(dst).tobytes()
          )
  
file_path: catboost/contrib/tools/python/src/Lib/ctypes/test/test_pickling.py
imports: import unittest
  import pickle
  from ctypes import *
  import _ctypes_test
label_desc: Use image node_id 3 for calling the PickleTest obj's underlying member method code with example usage: obj.test_simple() without return types