code: def test_copying(self):
      for cls in WeakSet, WeakSetWithSlots:
          s = cls(self.items)
          s.x = ["x"]
          s.z = ["z"]
  
          dup = copy.copy(s)
          self.assertIsInstance(dup, cls)
          self.assertEqual(dup, s)
          self.assertIsNot(dup, s)
          self.assertIs(dup.x, s.x)
          self.assertIs(dup.z, s.z)
          self.assertFalse(hasattr(dup, "y"))
  
          dup = copy.deepcopy(s)
          self.assertIsInstance(dup, cls)
          self.assertEqual(dup, s)
          self.assertIsNot(dup, s)
          self.assertEqual(dup.x, s.x)
          self.assertIsNot(dup.x, s.x)
          self.assertEqual(dup.z, s.z)
          self.assertIsNot(dup.z, s.z)
          self.assertFalse(hasattr(dup, "y"))
  
imports: import unittest
  from weakref import WeakSet
  import copy
  import string
  from collections import UserString
  from collections.abc import Set, MutableSet
  import gc
  import contextlib
  from test import support
label_desc: Use image node_id 47 for calling the TestWeakSet obj's underlying member method code with example usage: obj.test_copying() without return types