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[3.12] GH-87358: Add clarification about nargs and default argparse behaviour (GH-124094) #124441

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Sep 24, 2024
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[3.12] GH-87358: Add clarification about nargs and default argparse behaviour (GH-124094) #124441

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3 changes: 3 additions & 0 deletions Doc/library/argparse.rst
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Expand Up @@ -1121,6 +1121,9 @@ 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::
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