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bpo-38531: document extend action's added version (GH-16865)

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Batuhan Taşkaya 2019-10-20 23:13:54 +03:00 • committed by Raymond Hettinger
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Doc/library/argparse.rst
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@ -838,6 +838,8 @@ how the command-line arguments should be handled. The supplied actions are:
>>> parser.parse_args(["--foo", "f1", "--foo", "f2", "f3", "f4"]) >>> parser.parse_args(["--foo", "f1", "--foo", "f2", "f3", "f4"])
Namespace(foo=['f1', 'f2', 'f3', 'f4']) Namespace(foo=['f1', 'f2', 'f3', 'f4'])
.. versionadded:: 3.8
You may also specify an arbitrary action by passing an Action subclass or You may also specify an arbitrary action by passing an Action subclass or
other object that implements the same interface. The ``BooleanOptionalAction`` other object that implements the same interface. The ``BooleanOptionalAction``
is available in ``argparse`` and adds support for boolean actions such as is available in ``argparse`` and adds support for boolean actions such as