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[3.13] gh-74366: Fix the documentation of "$" in PyArg_ParseTupleAndKeywords() (GH-155301) by miss-islington · Pull Request #155310 · python/cpython · GitHub

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[3.13] gh-74366: Fix the documentation of "$" in PyArg_ParseTupleAndKeywords() (GH-155301) #155310

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serhiy-storchaka merged 1 commit into from
Aug 7, 2026
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[3.13] gh-74366: Fix the documentation of "$" in PyArg_ParseTupleAndKeywords() (GH-155301) #155310

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11 changes: 8 additions & 3 deletions Doc/c-api/arg.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -371,13 +371,18 @@ inside nested parentheses. They are:
their default value --- when an optional argument is not specified,
:c:func:`PyArg_ParseTuple` does not touch the contents of the corresponding C
variable(s).
For example, the format string ``"OO|OO"`` corresponds to the Python
signature ``f(a, b, c=None, d=None)``.

``$``
:c:func:`PyArg_ParseTupleAndKeywords` only:
Indicates that the remaining arguments in the Python argument list are
keyword-only. Currently, all keyword-only arguments must also be optional
arguments, so ``|`` must always be specified before ``$`` in the format
string.
keyword-only.
They are optional if ``|`` was specified before ``$``, and required otherwise.
``|`` cannot be specified after ``$``.
For example, the format string ``"O|O$O"`` corresponds to the Python
signature ``f(a, b=None, *, c=None)``,
and the format string ``"OO$OO"`` corresponds to ``f(a, b, *, c, d)``.

.. versionadded:: 3.3

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