[issue46934] A started multiprocessing.Process instance cannot be serialised

Change by Géry : -- keywords: +patch pull_requests: +29821 stage: -> patch review pull_request: https://github.com/python/cpython/pull/31701 ___ Python tracker ___

[issue46934] A started multiprocessing.Process instance cannot be serialised

New submission from Géry : The Python program: ``` import multiprocessing import time class Application: def __init__(self): self._event = multiprocessing.Event() self._processes = [ multiprocessing.Process(target=self._worker) for _ in range(multip