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[3.13] GH-87358: Add clarification about nargs and default argparse behaviour (GH-124094) (#124440)

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GH-87358: Add clarification about nargs and default argparse behaviour (GH-124094)
(cherry picked from commit 20ccda000b)

Co-authored-by: Savannah Ostrowski <savannahostrowski@gmail.com>
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Miss Islington (bot) 2024-09-24 20:08:02 +02:00 • committed by GitHub
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Doc/library/argparse.rst
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@ -1122,6 +1122,9 @@ is used when no command-line argument was present::
>>> parser.parse_args([])
Namespace(foo=42)
For required_ arguments, the ``default`` value is ignored. For example, this
applies to positional arguments with nargs_ values other than ``?`` or ``*``,
or optional arguments marked as ``required=True``.
Providing ``default=argparse.SUPPRESS`` causes no attribute to be added if the
command-line argument was not present::