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gh-141004: Mark up constants for `PyOS_double_to_string` by encukou · Pull Request #143867 · python/cpython · GitHub

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gh-141004: Mark up constants for PyOS_double_to_string #143867

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encukou merged 1 commit into from
Jan 22, 2026
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gh-141004: Mark up constants for PyOS_double_to_string #143867

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20 changes: 17 additions & 3 deletions Doc/c-api/conversion.rst
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Expand Up @@ -130,6 +130,8 @@ The following functions provide locale-independent string to number conversions.

*flags* can be zero or more of the following values or-ed together:

.. c:namespace:: NULL

.. c:macro:: Py_DTSF_SIGN

Always precede the returned string with a sign
Expand All @@ -151,9 +153,21 @@ The following functions provide locale-independent string to number conversions.

.. versionadded:: 3.11

If *ptype* is non-``NULL``, then the value it points to will be set to one of
``Py_DTST_FINITE``, ``Py_DTST_INFINITE``, or ``Py_DTST_NAN``, signifying that
*val* is a finite number, an infinite number, or not a number, respectively.
If *ptype* is non-``NULL``, then the value it points to will be set to one
of the following constants depending on the type of *val*:

.. list-table::
:header-rows: 1
:align: left

* - *\*ptype*
- type of *val*
* - .. c:macro:: Py_DTST_FINITE
- finite number
* - .. c:macro:: Py_DTST_INFINITE
- infinite number
* - .. c:macro:: Py_DTST_NAN
- not a number

The return value is a pointer to *buffer* with the converted string or
``NULL`` if the conversion failed. The caller is responsible for freeing the
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