Deprecate `asyncio.iscoroutinefunction`

[kumaraditya303]

asyncio.iscoroutinefunction should be deprecated in favor of inspect.iscoroutinefunction, we don't need two different functions to do the same thing. I propose to deprecate asyncio.iscoroutinefunction because IMO these introspection functions don't belong to asyncio but more to inspect module. It will be deprecated in Python 3.14 and scheduled for removal in Python 3.16.

Linked PRs

• gh-122858: Deprecate asyncio.iscoroutinefunction #122875

[Wulian233]

See #94923 , maybe you can review it :)

[Eclips4]

Looks like an duplicate of #94912

[kumaraditya303]

Looks like an duplicate of #94912

No it isn't, in this issue we are just deprecating it not making an alias.

[illia-v]

If you get the deprecation error and want to support Python < 3.12, you may need to still use asyncio.iscoroutinefunction conditionally for backward compatibility because before #94050 merged into 3.12 (and only some 3.10 and 3.11 releases) the functions hadn't been equivalent

if sys.version_info >= (3, 12):
    iscoroutinefunction = inspect.iscoroutinefunction
else:
    iscoroutinefunction = asyncio.iscoroutinefunction