https://github.com/python/cpython/commit/77a8bd29da99e7d4fa8e7f07c4063977c2bb14d3
commit: 77a8bd29da99e7d4fa8e7f07c4063977c2bb14d3
branch: main
author: AN Long <[email protected]>
committer: gpshead <[email protected]>
date: 2025-07-06T11:26:26-07:00
summary:
gh-109070: Document that get_context in multiprocessing have side effect
(#136341)
Document that get_context in multiprocessing have side effect
files:
M Doc/library/multiprocessing.rst
diff --git a/Doc/library/multiprocessing.rst b/Doc/library/multiprocessing.rst
index fc3c1134f97c85..546876bd925db0 100644
--- a/Doc/library/multiprocessing.rst
+++ b/Doc/library/multiprocessing.rst
@@ -1118,7 +1118,9 @@ Miscellaneous
Return a context object which has the same attributes as the
:mod:`multiprocessing` module.
- If *method* is ``None`` then the default context is returned.
+ If *method* is ``None`` then the default context is returned. Note that if
+ the global start method has not been set, this will set it to the
+ default method.
Otherwise *method* should be ``'fork'``, ``'spawn'``,
``'forkserver'``. :exc:`ValueError` is raised if the specified
start method is not available. See :ref:`multiprocessing-start-methods`.
@@ -1129,10 +1131,10 @@ Miscellaneous
Return the name of start method used for starting processes.
- If the start method has not been fixed and *allow_none* is false,
- then the start method is fixed to the default and the name is
- returned. If the start method has not been fixed and *allow_none*
- is true then ``None`` is returned.
+ If the global start method has not been set and *allow_none* is
+ ``False``, then the start method is set to the default and the name
+ is returned. If the start method has not been set and *allow_none* is
+ ``True`` then ``None`` is returned.
The return value can be ``'fork'``, ``'spawn'``, ``'forkserver'``
or ``None``. See :ref:`multiprocessing-start-methods`.
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