code: def setUp(self):
      self.read_fd, self.write_fd = os.pipe()
  
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 1 for calling the TestForkInThread obj's underlying member method code with example usage: obj.setUp() without return types