code: def _spawn_process(self):
      p = self._mp_context.Process(
          target=_process_worker,
          args=(
              self._call_queue,
              self._result_queue,
              self._initializer,
              self._initargs,
              self._max_tasks_per_child,
          ),
      )
      p.start()
      self._processes[p.pid] = p
  
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 5 for calling the ProcessPoolExecutor obj's underlying member method code with example usage: obj._spawn_process() without return types