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gh-126548: Add a thread-unsafety warning for importlib.reload() (GH-136704)

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Bartosz Sławecki 2025-07-16 18:34:14 +02:00 • committed by GitHub
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Doc/library/importlib.rst
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@ -206,6 +206,10 @@ Functions
:exc:`ModuleNotFoundError` is raised when the module being reloaded lacks
a :class:`~importlib.machinery.ModuleSpec`.
.. warning::
This function is not thread-safe. Calling it from multiple threads can result
in unexpected behavior. It's recommended to use the :class:`threading.Lock`
or other synchronization primitives for thread-safe module reloading.
:mod:`importlib.abc` -- Abstract base classes related to import
---------------------------------------------------------------