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gh-90876: Restore the ability to import multiprocessing when sys.executable is None (#106464)

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Prevent `multiprocessing.spawn` from failing to *import* in environments
where `sys.executable` is `None`.  This regressed in 3.11 with the addition
of support for path-like objects in multiprocessing.

Adds a test decorator to have tests only run when part of test_multiprocessing_spawn to `_test_multiprocessing.py` so we can start to avoid re-running the same not-global-state specific test in all 3 modes when there is no need.
This commit is contained in:
Gregory P. Smith 2023-07-06 15:46:50 -07:00 • committed by GitHub
parent 76fac7bce5
commit c60df361ce
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3 changed files with 83 additions and 8 deletions
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6
Lib/multiprocessing/spawn.py
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@ -31,11 +31,13 @@ if sys.platform != 'win32':
WINSERVICE = False
else:
WINEXE = getattr(sys, 'frozen', False)
WINSERVICE = sys.executable.lower().endswith("pythonservice.exe")
WINSERVICE = sys.executable and sys.executable.lower().endswith("pythonservice.exe")
def set_executable(exe):
global _python_exe
if sys.platform == 'win32':
if exe is None:
_python_exe = exe
elif sys.platform == 'win32':
_python_exe = os.fsdecode(exe)
else:
_python_exe = os.fsencode(exe)