code: def clear(self):
      self._cond.acquire()
      try:
          self._flag.acquire(False)
      finally:
          self._cond.release()
  
imports: import threading
  import os
  import sys
  from time import time, sleep
  import _multiprocessing
  from multiprocessing.process import current_process
  from multiprocessing.util import Finalize, register_after_fork, debug
  from multiprocessing.forking import assert_spawning, Popen
label_desc: Use image node_id 4 for calling the Event obj's underlying member method code with example usage: obj.clear() without return types