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[3.13] gh-141004: Document `Py_MATH_{E, PI, TAU}` constants (GH-141373) by miss-islington · Pull Request #141472 · python/cpython · GitHub

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[3.13] gh-141004: Document Py_MATH_{E, PI, TAU} constants (GH-141373) #141472

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Nov 12, 2025
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[3.13] gh-141004: Document Py_MATH_{E, PI, TAU} constants (GH-141373) #141472

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17 changes: 17 additions & 0 deletions Doc/c-api/float.rst
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Expand Up @@ -96,16 +96,33 @@ Floating-Point Objects
the C11 standard ``<math.h>`` header.


.. c:macro:: Py_MATH_E

The definition (accurate for a :c:expr:`double` type) of the :data:`math.e` constant.


.. c:macro:: Py_MATH_El

High precision (long double) definition of :data:`~math.e` constant.


.. c:macro:: Py_MATH_PI

The definition (accurate for a :c:expr:`double` type) of the :data:`math.pi` constant.


.. c:macro:: Py_MATH_PIl

High precision (long double) definition of :data:`~math.pi` constant.


.. c:macro:: Py_MATH_TAU

The definition (accurate for a :c:expr:`double` type) of the :data:`math.tau` constant.

.. versionadded:: 3.6


.. c:macro:: Py_RETURN_NAN

Return :data:`math.nan` from a function.
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