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bpo-22257: Mention startup refactoring in What's New #4286

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14 changes: 14 additions & 0 deletions Doc/whatsnew/3.7.rst
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Expand Up @@ -686,6 +686,20 @@ CPython bytecode changes
(Contributed by Yury Selivanov and INADA Naoki in :issue:`26110`.)


Other CPython implementation changes
------------------------------------

* In preparation for potential future changes to the public CPython runtime
initialization API (see :pep:`432` for details), CPython's internal startup
and configuration management logic has been significantly refactored. While
these updates are intended to be entirely transparent to both embedding
applications and users of the regular CPython CLI, they're being mentioned
here as the refactoring changes the internal order of various operations
during interpreter startup, and hence may uncover previously latent defects,
either in embedding applications, or in CPython itself.
(Contributed by Nick Coghlan and Eric Snow as part of :issue:`22257`.)


Documentation
=============

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