Bug 2345527 - python-terminado fails to build with Python 3.14: DeprecationWarning: 'asyncio.DefaultEventLoopPolicy' is deprecated and slated for removal in Python 3.16
Summary: python-terminado fails to build with Python 3.14: DeprecationWarning: 'asynci...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: python-terminado
Version: rawhide
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Orion Poplawski
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks: PYTHON3.14
TreeView+ depends on / blocked
 
Reported: 2025-02-13 11:45 UTC by Karolina Surma
Modified: 2025-02-28 02:47 UTC (History)
7 users (show)

Fixed In Version: python-terminado-0.18.1-2.fc43
Clone Of:
Environment:
Last Closed: 2025-02-28 02:47:52 UTC
Type: Bug
Embargoed:


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Github jupyter terminado issues 243 0 None open Build failure with Python 3.14 2025-02-17 04:47:34 UTC

Description Karolina Surma 2025-02-13 11:45:04 UTC
python-terminado fails to build with Python 3.14.05.

Test suite errors due to "'asyncio.DefaultEventLoopPolicy' 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_64/08651115-python-terminado/

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

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 Orion Poplawski 2025-02-17 04:47:34 UTC
Reported upstream,

Comment 2 Orion Poplawski 2025-02-17 04:49:05 UTC
I suspect that adding  -W ignore::DeprecationWarning to %pytest would resolve it.  That may be what we want to do with this package.

Comment 3 Fedora Update System 2025-02-28 02:45:51 UTC
FEDORA-2025-16843a91b7 (python-terminado-0.18.1-2.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2025-16843a91b7

Comment 4 Fedora Update System 2025-02-28 02:47:52 UTC
FEDORA-2025-16843a91b7 (python-terminado-0.18.1-2.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.


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