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GH-84559: Deprecate fork being the multiprocessing default. (#100618)

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This starts the process. Users who don't specify their own start method
and use the default on platforms where it is 'fork' will see a
DeprecationWarning upon multiprocessing.Pool() construction or upon
multiprocessing.Process.start() or concurrent.futures.ProcessPool use.

See the related issue and documentation within this change for details.
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Gregory P. Smith 2023-02-02 15:50:35 -08:00 • committed by GitHub
parent 618b7a8260
commit 0ca67e6313
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16 changed files with 284 additions and 63 deletions
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Lib/test/_test_venv_multiprocessing.py
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@ -30,6 +30,7 @@ def test_func():
def main():
multiprocessing.set_start_method('spawn')
test_pool = multiprocessing.Process(target=test_func)
test_pool.start()
test_pool.join()