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bpo-37751: Document the change in What's New in Python 3.9 #23096

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vstinner merged 1 commit into from
Apr 23, 2021
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bpo-37751: Document the change in What's New in Python 3.9 #23096

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6 changes: 6 additions & 0 deletions Doc/whatsnew/3.9.rst
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Expand Up @@ -1110,6 +1110,12 @@ Changes in the Python API
compatible classes that don't inherit from those mentioned types.
(Contributed by Roger Aiudi in :issue:`34775`).

* :func:`codecs.lookup` now normalizes the encoding name the same way as
:func:`encodings.normalize_encoding`, except that :func:`codecs.lookup` also
converts the name to lower case. For example, ``"latex+latin1"`` encoding
name is now normalized to ``"latex_latin1"``.
(Contributed by Jordon Xu in :issue:`37751`.)


Changes in the C API
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