code: def test_stack_size(self):
      # Various stack size tests.
      self.assertEqual(
          thread.stack_size(), 0, "initial stack size is not 0"
      )
  
      thread.stack_size(0)
      self.assertEqual(
          thread.stack_size(), 0, "stack_size not reset to default"
      )
  
imports: import os
  import unittest
  import random
  from test import support
  from test.support import threading_helper
  import _thread
  import time
  import warnings
  import weakref
  from test import lock_tests
label_desc: Use image node_id 4 for calling the ThreadRunningTests obj's underlying member method code with example usage: obj.test_stack_size() without return types