[issue41577] Cannot use ProcessPoolExecutor if in a decorator?

Change by Bob Fang : -- versions: +Python 3.6, Python 3.7, Python 3.9 ___ Python tracker <https://bugs.python.org/issue41577> ___ ___ Python-bugs-list mailin

[issue41577] Cannot use ProcessPoolExecutor if in a decorator?

New submission from Bob Fang : I have this minimal example: ``` from functools import wraps from concurrent import futures import random def decorator(func): num_process = 4 def impl(*args, **kwargs): with futures.ProcessPoolExecutor() as executor: fs