Feature or enhancement

Proposal:

isnan(), isinf() and isfinite() are part of C99, which is a requirement for 3.11+. Probably, it does make sense to deprecate (undocumented) public macros and switch codebase to use C stdlib functions.

JFR: #119457 (comment)

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

Linked PRs

• gh-119613: use C99+ functions instead of Py_IS_NAN/INFINITY/FINITE #119619
• gh-119613: deprecate Py_IS_NAN/INFINITY and Py_IS_FINITE #119701
• gh-119613: Soft deprecate the Py_MEMCPY() macro #120020