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Commit80284b5

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eddymulgpshead
andauthored
gh-80334: fix multiprocessing.freeze_support for other spawn platforms (GH-134462)
Doc/library/multiprocessing.rst: freeze_support: Change to specify spawn method instead of platformHave multiprocessing.freeze_support() enable on spawn, not just win32.---------Co-authored-by: Gregory P. Smith <greg@krypto.org>
1 parent74a9c60 commit80284b5

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‎Doc/library/multiprocessing.rst

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@@ -1081,7 +1081,7 @@ Miscellaneous
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..function::freeze_support()
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Add support for when a program which uses:mod:`multiprocessing` has been
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frozen to producea Windows executable. (Has been tested with **py2exe**,
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frozen to producean executable. (Has been tested with **py2exe**,
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**PyInstaller** and **cx_Freeze**.)
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One needs to call this function straight after the ``if __name__ ==
@@ -1099,10 +1099,10 @@ Miscellaneous
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If the ``freeze_support()`` line is omitted then trying to run the frozen
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executable will raise:exc:`RuntimeError`.
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Calling ``freeze_support()`` has no effect wheninvoked on any operating
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system other than Windows.In addition, if the module is being run
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normally by the Pythoninterpreteron Windows(the program has not been
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frozen), then ``freeze_support()``has no effect.
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Calling ``freeze_support()`` has no effect whenthe start method is not
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*spawn*.In addition, if the module is being run normally by the Python
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interpreter (the program has not been frozen), then ``freeze_support()``
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has no effect.
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..function::get_all_start_methods()
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‎Lib/multiprocessing/context.py

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@@ -145,7 +145,7 @@ def freeze_support(self):
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'''Check whether this is a fake forked process in a frozen executable.
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If so then run code specified by commandline and exit.
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'''
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ifsys.platform=='win32'andgetattr(sys,'frozen',False):
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ifself.get_start_method()=='spawn'andgetattr(sys,'frozen',False):
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from .spawnimportfreeze_support
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freeze_support()
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:func:`multiprocessing.freeze_support` now checks for work on any "spawn"
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start method platform rather than only on Windows.

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