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PEP 686: Change target version to 3.13 #2457

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methane merged 3 commits into from
Mar 23, 2022
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PEP 686: Change target version to 3.13 #2457

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PEP 686: Change target version to 3.13
methane Mar 22, 2022
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remove single backtick
methane Mar 22, 2022
5c69bdb
Update pep-0686.rst
methane Mar 22, 2022
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18 changes: 11 additions & 7 deletions pep-0686.rst
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Expand Up @@ -6,7 +6,7 @@ Status: Draft
Type: Standards Track
Content-Type: text/x-rst
Created: 18-Mar-2022
Python-Version: 3.12
Python-Version: 3.13
Post-History: `18-Mar-2022 <https://discuss.python.org/t/14435>`__


Expand Down Expand Up @@ -55,14 +55,18 @@ User can still disable UTF-8 mode by setting ``PYTHONUTF8=0`` or ``-X utf8=0``.
``locale.get_encoding()``
-------------------------

Add ``locale.get_encoding()``. It is same to
``locale.getpreferredencoding(False)`` except it don't follow UTF-8 mode.
Currently, ``TextIOWrapper`` uses ``locale.getpreferredencoding(False)``
when ``encoding="locale"`` option is specified. It is ``"UTF-8"`` in UTF-8 mode.

This API will be used by ``io.TextIOWrapper`` to support ``encoding="locale"``
option.
This behavior is inconsistent with the :pep:`597` motivation.
``TextIOWrapper`` should use locale encoding when ``encoding="locale"`` is
passed before/after the default encoding is changed to UTF-8.

This change will be released in Python 3.11 so that users can prepare before
UTF-8 mode is enabled by default.
To fix this inconsistency, we will add ``locale.get_encoding()``. It is same
to ``locale.getpreferredencoding(False)`` but it ignore the UTF-8 mode.

This change will be released in Python 3.11 so that users can use UTF-8 mode
that is same to Python 3.13.


Backward Compatibility
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