Feature or enhancement
Proposal:
Of course, these functions can be emulated in pure-Python.
On another hand, people can reasonably expect these classifiers as "The math module consists mostly of thin wrappers around the platform C math library functions." (c) isnormal() was in libm since C99 and issubnormal() - since C23.
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