code: def clear(self):
      if not self._closed:
          while self._reader.poll():
              self._reader.recv_bytes()
  
imports: import os
  from concurrent.futures import _base
  import queue
  import multiprocessing
  import multiprocessing.connection
  from multiprocessing.queues import Queue
  import threading
  import weakref
  from functools import partial
  import itertools
  import sys
  from traceback import format_exception
label_desc: Use image node_id 4 for calling the _ThreadWakeup obj's underlying member method code with example usage: obj.clear() without return types