Bug 2326925 - python-zstandard fails to build with Python 3.14: ImportError: cannot import name 'ByteString' from 'typing'
Summary: python-zstandard fails to build with Python 3.14: ImportError: cannot import ...
Keywords:
Status: CLOSED RAWHIDE
Alias: None
Product: Fedora
Classification: Fedora
Component: python-zstandard
Version: rawhide
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Dominik 'Rathann' Mierzejewski
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks: PYTHON3.14
TreeView+ depends on / blocked
 
Reported: 2024-11-18 09:05 UTC by Karolina Surma
Modified: 2025-06-15 18:31 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2025-06-15 18:31:08 UTC
Type: Bug
Embargoed:


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Fedora Package Sources python-zstandard pull-request 4 0 None None None 2025-03-28 16:49:54 UTC
Github indygreg python-zstandard issues 238 0 None open typing.Bytes string will be removed in Python 3.14 2025-05-27 09:27:53 UTC

Description Karolina Surma 2024-11-18 09:05:19 UTC
python-zstandard fails to build with Python 3.14.0a1.

+ /usr/bin/python3 -sP /usr/lib/rpm/redhat/import_all_modules.py -f /builddir/build/BUILD/python-zstandard-0.23.0-build/python-zstandard-0.23.0-1.fc42.x86_64-pyproject-modules
Check import: zstandard
Traceback (most recent call last):
  File "/usr/lib/rpm/redhat/import_all_modules.py", line 171, in <module>
    main()
    ~~~~^^
  File "/usr/lib/rpm/redhat/import_all_modules.py", line 167, in main
    import_modules(modules)
    ~~~~~~~~~~~~~~^^^^^^^^^
  File "/usr/lib/rpm/redhat/import_all_modules.py", line 100, in import_modules
    importlib.import_module(module)
    ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^
  File "/usr/lib64/python3.14/importlib/__init__.py", line 88, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1386, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1359, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1330, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 752, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/builddir/build/BUILD/python-zstandard-0.23.0-build/BUILDROOT/usr/lib64/python3.14/site-packages/zstandard/__init__.py", line 21, in <module>
    from typing import ByteString
ImportError: cannot import name 'ByteString' from 'typing' (/usr/lib64/python3.14/typing.py)

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

ByteString has been removed from both typing and collections.abc modules.
It had previously raised a DeprecationWarning since Python 3.12.


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_64/08257983-python-zstandard/

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

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 Dominik 'Rathann' Mierzejewski 2024-11-18 10:19:49 UTC
Upstream is aware.

Comment 2 Aoife Moloney 2025-02-26 13:16:58 UTC
This bug appears to have been reported against 'rawhide' during the Fedora Linux 42 development cycle.
Changing version to 42.

Comment 3 Dominik 'Rathann' Mierzejewski 2025-05-27 09:34:29 UTC
Waiting for upstream to merge the PR.


Note You need to log in before you can comment on or make changes to this bug.