code: def _cleanup():
      # check for processes which have finished
      for p in list(_children):
          if p._popen.poll() is not None:
              _children.discard(p)
  
imports: import sys
  import fiber.util
  import itertools
  import multiprocessing
  import logging
  from multiprocessing.process import BaseProcess
label_desc: Use image node_id 1 for calling a global function with example usage: _cleanup() without return types