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bpo-42385: [Enum] add _generate_next_value_ to StrEnum (GH-23735)

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The default for auto() is to return an integer, which doesn't work for `StrEnum`.  The new `_generate_next_value_` for `StrEnum` returns the member name, lower cased.
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Ethan Furman 2020-12-10 12:20:06 -08:00 • committed by GitHub
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Doc/library/enum.rst
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@ -67,10 +67,12 @@ helper, :class:`auto`.
.. class:: auto
Instances are replaced with an appropriate value for Enum members. By default, the initial value starts at 1.
Instances are replaced with an appropriate value for Enum members.
:class:`StrEnum` defaults to the lower-cased version of the member name,
while other Enums default to 1 and increase from there.
.. versionadded:: 3.6 ``Flag``, ``IntFlag``, ``auto``
.. versionadded:: 3.10 ``StrEnum``
Creating an Enum
----------------