code: def is_alive(self):
      from multiprocess.connection import wait
  
      return not wait([self._sentinel], timeout=0)
  
imports: import os
  import sys
  import signal
  import itertools
  import threading
  from _weakrefset import WeakSet
label_desc: Use image node_id 2 for calling the _ParentProcess obj's underlying member method code with example usage: obj.is_alive() and returns: unknown