Issue 36306: inspect.signature(math.log) raises ValueError (original) (raw)

import math, inspect inspect.signature(math.log) Traceback (most recent call last): File "", line 1, in File "/Users/remi/src/cpython/Lib/inspect.py", line 3081, in signature return Signature.from_callable(obj, follow_wrapped=follow_wrapped) File "/Users/remi/src/cpython/Lib/inspect.py", line 2830, in from_callable return _signature_from_callable(obj, sigcls=cls, File "/Users/remi/src/cpython/Lib/inspect.py", line 2284, in _signature_from_callable return _signature_from_builtin(sigcls, obj, File "/Users/remi/src/cpython/Lib/inspect.py", line 2109, in _signature_from_builtin raise ValueError("no signature found for builtin {!r}".format(func)) ValueError: no signature found for builtin

This is the only function from math to do so, it may be related to issue 29299 but the patch from Victor Stinner does not fix this.

It's the only function with an optional argument in math, on 3.7 all such function result in ValueError, e.g. getattr, iter, max.