Message 352812 - Python tracker

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Author	dhiltonp
Recipients	asvetlov, dhiltonp, yselivanov
Date	2019-09-19.18:38:39
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1568918319.91.0.348855638851.issue38225@roundup.psfhosted.org>
In-reply-to

Content
If a python piece of code imports cython code with async defs, `asyncio.iscoroutinefunction` cannot determine that the code is async. https://github.com/cython/cython/issues/2273#issuecomment-531537624 scoder is open to marking async defs so that they can be identified, just like `asyncio.coroutine`: https://github.com/python/cpython/blob/ae239f6b0626e926613a4a1dbafa323bd41fec32/Lib/asyncio/coroutines.py#L156 However, that is an internal interface and `@coroutine` is deprecated. -------------- Can we have some official way of marking functions as async that will not be deprecated? The easiest would be for `asyncio.iscoroutinefunction` to look for `_is_coroutine = True`, and promise to keep looking for that value. This would also allow for functools.partial to easily mark that it's returning an async function, which some people seem to care about.

If a python piece of code imports cython code with async defs, `asyncio.iscoroutinefunction` cannot determine that the code is async.

https://github.com/cython/cython/issues/2273#issuecomment-531537624

scoder is open to marking async defs so that they can be identified, just like `asyncio.coroutine`:

https://github.com/python/cpython/blob/ae239f6b0626e926613a4a1dbafa323bd41fec32/Lib/asyncio/coroutines.py#L156

However, that is an internal interface and `@coroutine` is deprecated.

--------------

Can we have some official way of marking functions as async that will not be deprecated?

The easiest would be for `asyncio.iscoroutinefunction` to look for `_is_coroutine = True`, and promise to keep looking for that value.

This would also allow for functools.partial to easily mark that it's returning an async function, which some people seem to care about.

History
Date	User	Action	Args
2019-09-19 18:38:39	dhiltonp	set	recipients: + dhiltonp, asvetlov, yselivanov
2019-09-19 18:38:39	dhiltonp	set	messageid: <1568918319.91.0.348855638851.issue38225@roundup.psfhosted.org>
2019-09-19 18:38:39	dhiltonp	link	issue38225 messages
2019-09-19 18:38:39	dhiltonp	create