Bug 2339466 - python-pytest-aiohttp fails to build with Python 3.14: DeprecationWarning: 'asyncio.get_event_loop_policy' is deprecated and slated for removal in Python 3.16
Summary: python-pytest-aiohttp fails to build with Python 3.14: DeprecationWarning: 'a...
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: python-pytest-aiohttp
Version: rawhide
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Fabian Affolter
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks: PYTHON3.14
TreeView+ depends on / blocked
 
Reported: 2025-01-22 14:19 UTC by Karolina Surma
Modified: 2025-03-31 10:42 UTC (History)
3 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: Bug
Embargoed:


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Description Karolina Surma 2025-01-22 14:19:13 UTC
python-pytest-aiohttp fails to build with Python 3.14.0a4.

10 tests error with:
/usr/lib/python3.14/site-packages/pytest_asyncio/plugin.py:1005: in event_loop_policy
    return asyncio.get_event_loop_policy()
/usr/lib64/python3.14/asyncio/events.py:806: in get_event_loop_policy
    warnings._deprecated('asyncio.get_event_loop_policy', remove=(3, 16))
/usr/lib64/python3.14/warnings.py:668: in _deprecated
    warn(msg, DeprecationWarning, stacklevel=3)
E   DeprecationWarning: 'asyncio.get_event_loop_policy' is deprecated and slated for removal in Python 3.16

According to https://docs.python.org/dev/whatsnew/3.14.html#id3

asyncio policy system is deprecated and will be removed in Python 3.16. In particular, the following classes and functions are deprecated:
asyncio.AbstractEventLoopPolicy
asyncio.DefaultEventLoopPolicy
asyncio.WindowsSelectorEventLoopPolicy
asyncio.WindowsProactorEventLoopPolicy
asyncio.get_event_loop_policy()
asyncio.set_event_loop_policy()
asyncio.set_event_loop()
Users should use asyncio.run() or asyncio.Runner with loop_factory to use the desired event loop implementation.)


https://docs.python.org/3.14/whatsnew/3.14.html

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.14/fedora-rawhide-x86_64/08554992-python-pytest-aiohttp/

For all our attempts to build python-pytest-aiohttp with Python 3.14, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.14/package/python-pytest-aiohttp/

Testing and mass rebuild of packages is happening in copr.
You can follow these instructions to test locally in mock if your package builds with Python 3.14:
https://copr.fedorainfracloud.org/coprs/g/python/python3.14/

Let us know here if you have any questions.

Python 3.14 is planned to be included in Fedora 43.
To make that update smoother, we're building Fedora packages with all pre-releases of Python 3.14.
A build failure prevents us from testing all dependent packages (transitive [Build]Requires),
so if this package is required a lot, it's important for us to get it fixed soon.

We'd appreciate help from the people who know this package best,
but if you don't want to work on this now, let us know so we can try to work around it on our side.

Comment 1 Aoife Moloney 2025-02-26 13:25:17 UTC
This bug appears to have been reported against 'rawhide' during the Fedora Linux 42 development cycle.
Changing version to 42.


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