Documentation

While investigating encode/starlette#2648, I've noticed that the behavior of inspect.isroutine() changed with regards to functools.partial().

Please consider the following sample:

import inspect
from functools import partial

def foo(x):
    pass

p = partial(foo, 1)
print(inspect.isroutine(p))

Prior to 3.13.0b3, it would evaluate to False. In newer versions, it evaluates to True.

A bisect points out that it changed as a result of 49e5740 (i.e. #121086). Neither the commit message, nor the news entry, hints anything about inspect.isroutine() behavior.

Could you please clarify whether the change was intentional? And if it was, could we have it explicitly noted in the documentation?

Linked PRs

• [3.13] gh-122087: Restore ismethoddescriptor() and isroutine() for partial objects #122218
• gh-122087: Add tests for ismethoddescriptor() and isroutine() with partial objects #122219