Bug 2440575

Summary: quodlibet fails to build with Python 3.15: ModuleNotFoundError: No module named 'sre_constants'
Product: [Fedora] Fedora Reporter: Karolina Surma <ksurma>
Component: quodlibetAssignee: hannes <johannes.lips>
Status: CLOSED RAWHIDE QA Contact: Fedora Extras Quality Assurance <extras-qa>
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Version: rawhideCC: johannes.lips, ksurma, mhroncok, priv.luk
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Last Closed: 2026-02-18 12:16:01 UTC Type: Bug
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Bug Blocks: 2412434    

Description Karolina Surma 2026-02-18 12:01:08 UTC
quodlibet fails to build with Python 3.15.0a6.

__________________ ERROR collecting tests/test_util_cover.py ___________________
ImportError while importing test module '/builddir/build/BUILD/quodlibet-4.7.1-build/quodlibet-4.7.1/tests/test_util_cover.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.15/importlib/__init__.py:88: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
tests/test_util_cover.py:17: in <module>
    from quodlibet.ext.covers.artwork_url import ArtworkUrlCover
quodlibet/ext/covers/artwork_url.py:13: in <module>
    from quodlibet.util.cover.http import HTTPDownloadMixin
quodlibet/util/cover/__init__.py:6: in <module>
    from .manager import CoverManager
quodlibet/util/cover/manager.py:17: in <module>
    from quodlibet.util.cover import built_in
quodlibet/util/cover/built_in.py:13: in <module>
    import sre_constants
E   ModuleNotFoundError: No module named 'sre_constants'

https://docs.python.org/3.15/whatsnew/3.15.html

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.15/fedora-rawhide-x86_64/10144926-quodlibet/

For all our attempts to build quodlibet with Python 3.15, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.15/package/quodlibet/

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 3.15:
https://copr.fedorainfracloud.org/coprs/g/python/python3.15/

Let us know here if you have any questions.

Python 3.15 is planned to be included in Fedora 45.
To make that update smoother, we're building Fedora packages with all pre-releases of Python 3.15.
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.