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gh-134160: Split extension module init from PyModule docs; emphasize multi-phase init #135126

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Merged
encukou merged 5 commits into from
Jun 13, 2025
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gh-134160: Split extension module init from PyModule docs; emphasize multi-phase init #135126

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gh-134160: Split extension module init from PyModule docs; emphasize …
encukou Jun 3, 2025
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encukou Jun 5, 2025
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Single-phase init shares objects across interpreters
encukou Jun 6, 2025
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encukou Jun 12, 2025
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encukou Jun 13, 2025
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Single-phase init shares objects across interpreters
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@encukou
encukou committed Jun 6, 2025
commit fe2f5b63168cb6c5a47afba8ca4436b9f8453ec5
9 changes: 5 additions & 4 deletions Doc/c-api/extension-modules.rst
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Expand Up @@ -198,11 +198,12 @@ in the following ways:

* Single-phase modules are, or rather *contain*, “singletons”.

When the module is initialized, Python saves the contents of the module's
``__dict__`` (that is, typically, the module's functions and types).
When the module is first initialized, Python saves the contents of
the module's ``__dict__`` (that is, typically, the module's functions and
types).

For subsequent initializations in the same interpreter, Python does not call
the initialization function again.
For subsequent imports, Python does not call the initialization function
again.
Instead, it creates a new module object with a new ``__dict__``, and copies
the saved contents to it.
For example, given a single-phase module ``_testsinglephase``
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