packaging 26.0

Read about the performance improvements here: https://iscinumpy.dev/post/packaging-faster.

What's Changed

Features:

• PEP 751: support pylock by @sbidoul in https://github.com/pypa/packaging/pull/900
• PEP 794: import name metadata by @brettcannon in https://github.com/pypa/packaging/pull/948
• Support writing metadata by @henryiii in https://github.com/pypa/packaging/pull/846
• Support __replace__ for Version by @henryiii in https://github.com/pypa/packaging/pull/1003
• Support positional pattern matching for Version and Specifier by @henryiii in https://github.com/pypa/packaging/pull/1004

Behavior adaptations:

• PEP 440 handling of prereleases for Specifier.contains, SpecifierSet.contains, and SpecifierSet.filter by @notatallshaw in https://github.com/pypa/packaging/pull/897
• Handle PEP 440 edge case in SpecifierSet.filter by @notatallshaw in https://github.com/pypa/packaging/pull/942
• Adjust arbitrary equality intersection preservation in SpecifierSet by @notatallshaw in https://github.com/pypa/packaging/pull/951
• Return False instead of raising for .contains with invalid version by @Liam-DeVoe in https://github.com/pypa/packaging/pull/932
• Support arbitrary equality on arbitrary strings for Specifier and SpecifierSet's filter and contains method. by @notatallshaw in https://github.com/pypa/packaging/pull/954
• Only try to parse as Version on certain marker keys, return False on unequal ordered comparsions by @JP-Ellis in https://github.com/pypa/packaging/pull/939

Fixes:

• Update _hash when unpickling Tag() by @dholth in https://github.com/pypa/packaging/pull/860
• Correct comment and simplify implicit prerelease handling in Specifier.prereleases by @notatallshaw in https://github.com/pypa/packaging/pull/896
• Use explicit _GLibCVersion NamedTuple in _manylinux by @cthoyt in https://github.com/pypa/packaging/pull/868
• Detect invalid license expressions containing () by @bwoodsend in https://github.com/pypa/packaging/pull/879
• Correct regex for metadata 'name' format by @di in https://github.com/pypa/packaging/pull/925
• Improve the message around expecting a semicolon by @pradyunsg in https://github.com/pypa/packaging/pull/833
• Support nested parens in license expressions by @Liam-DeVoe in https://github.com/pypa/packaging/pull/931
• Add space before at symbol in Requirements string by @henryiii in https://github.com/pypa/packaging/pull/953
• A root logger use found by ruff LOG, use packaging logger instead by @henryiii in https://github.com/pypa/packaging/pull/965
• Better support for subclassing Marker and Requirement by @henryiii in https://github.com/pypa/packaging/pull/1022
• Normalize all extras, not just if it comes first by @henryiii in https://github.com/pypa/packaging/pull/1024
• Don't produce a broken repr if Marker fails to construct by @henryiii in https://github.com/pypa/packaging/pull/1033

Performance:

• Avoid recompiling regexes in the tokenizer for a 3x speedup by @hauntsaninja in https://github.com/pypa/packaging/pull/1019
• Improve performance in _manylinux.py by @cthoyt in https://github.com/pypa/packaging/pull/869
• Minor cleanups to Version by @bearomorphism in https://github.com/pypa/packaging/pull/913
• Skip redundant creation of Versions in specifier comparison by @notatallshaw in https://github.com/pypa/packaging/pull/986
• Cache Specifier's Version by @notatallshaw in https://github.com/pypa/packaging/pull/985
• Make Version a little faster by @henryiii in https://github.com/pypa/packaging/pull/987
• Minor Version regex cleanup by @henryiii in https://github.com/pypa/packaging/pull/990
• Faster regex on Python 3.11.5+ by @henryiii in https://github.com/pypa/packaging/pull/988 and https://github.com/pypa/packaging/pull/1055
• Lazily calculate _key in Version by @notatallshaw in https://github.com/pypa/packaging/pull/989 and regression for packaging_legacy fixed by @henryiii in https://github.com/pypa/packaging/pull/1048
• Faster canonicalize_version by @henryiii in https://github.com/pypa/packaging/pull/993
• Use fullmatch in a couple more places by @henryiii in https://github.com/pypa/packaging/pull/992
• Use fullmatch for markers too by @henryiii in https://github.com/pypa/packaging/pull/1029
• Use map instead of generator by @henryiii in https://github.com/pypa/packaging/pull/996
• Deprecate ._version (_Version, a NamedTuple) by @henryiii in https://github.com/pypa/packaging/pull/995 and https://github.com/pypa/packaging/pull/1062
• Avoid duplicate Version creation in canonicalize_version by @henryiii in https://github.com/pypa/packaging/pull/994
• Add __slots__ to Version by @henryiii in https://github.com/pypa/packaging/pull/1001
• Add __slots__ to Specifiers by @henryiii in https://github.com/pypa/packaging/pull/1002
• Add __slots__ to Nodes by @henryiii in https://github.com/pypa/packaging/pull/1032
• Use version.__replace__ in specifier comparison by @notatallshaw in https://github.com/pypa/packaging/pull/999
• Use _get_spec_version in more places in Specifier by @notatallshaw in https://github.com/pypa/packaging/pull/1005
• Pull set construction out of function by @henryiii in https://github.com/pypa/packaging/pull/1012
• Letter normalization dict for prereleases and the like by @henryiii in https://github.com/pypa/packaging/pull/1014
• Avoid normalizing extras again when comparing by @henryiii in https://github.com/pypa/packaging/pull/1028
• Speed up Version.__str__ by about 10% by @henryiii in https://github.com/pypa/packaging/pull/997
• Increase the performance of canonicalize_name by avoiding a regex by @henryiii in https://github.com/pypa/packaging/pull/1030, https://github.com/pypa/packaging/pull/1047, and https://github.com/pypa/packaging/pull/1064
• Faster zero stripping by @henryiii in https://github.com/pypa/packaging/pull/1058

Type annotations:

• Fix a type annotation by @brettcannon in https://github.com/pypa/packaging/pull/907
• Fix tags return type in parse_wheel_filename docs by @ncoghlan in https://github.com/pypa/packaging/pull/973
• Add type hint for _version in .version.Version by @brettcannon in https://github.com/pypa/packaging/pull/927
• Changed static type annotations in prereleases setter method in specifier.py by @subhajitsaha01 in https://github.com/pypa/packaging/pull/930
• Statically type the tests by @henryiii in https://github.com/pypa/packaging/pull/982

Internal:

• Test and declare support Python 3.14 by @henryiii in https://github.com/pypa/packaging/pull/901
• Modernize and speed up tests on Python 3.14 by @henryiii in https://github.com/pypa/packaging/pull/903
• Change our license metadata to use an SPDX license expression by @cdce8p in https://github.com/pypa/packaging/pull/881
• No need for license-files by @DimitriPapadopoulos in https://github.com/pypa/packaging/pull/924
• Update mypy by @hauntsaninja in https://github.com/pypa/packaging/pull/891
• Some config updates by @henryiii in https://github.com/pypa/packaging/pull/902
• Add spell check and rst check by @henryiii in https://github.com/pypa/packaging/pull/904
• Clean up ruff ignores by @henryiii in https://github.com/pypa/packaging/pull/905
• Update example for env marker python_version by @trim21 in https://github.com/pypa/packaging/pull/908
• Move codespell configuration into pyproject.toml by @yarikoptic in https://github.com/pypa/packaging/pull/910
• Check warning a little more precisely by @henryiii in https://github.com/pypa/packaging/pull/837
• Speed up mypy a little by @henryiii in https://github.com/pypa/packaging/pull/836
• Apply ruff/flake8-pyi rules (PYI) by @DimitriPapadopoulos in https://github.com/pypa/packaging/pull/835
• Better local runs for codespell by @henryiii in https://github.com/pypa/packaging/pull/911
• Remove outdated/confusing Gist link by @stefan6419846 in https://github.com/pypa/packaging/pull/921
• Fix docs and docs ci after #897 landed by @notatallshaw in https://github.com/pypa/packaging/pull/926
• Run twine-check on push in CI by @EpicWink in https://github.com/pypa/packaging/pull/922
• ruff was renamed ruff-check in pre-commit by @henryiii in https://github.com/pypa/packaging/pull/933
• Fix incorrectly implicitly concatenated string in specifiers test by @notatallshaw in https://github.com/pypa/packaging/pull/946
• Simplify conditional by @ofek in https://github.com/pypa/packaging/pull/949
• Modernize nox, use dependency-groups for tests by @henryiii in https://github.com/pypa/packaging/pull/952
• Add more checks that don't affect anything by @henryiii in https://github.com/pypa/packaging/pull/957
• Enable Ruff ISC rule by @henryiii in https://github.com/pypa/packaging/pull/959
• Ruff code FLY by @henryiii in https://github.com/pypa/packaging/pull/963
• pytest log_level is better than log_cli_level by @henryiii in https://github.com/pypa/packaging/pull/956
• Ruff code TRY by @henryiii in https://github.com/pypa/packaging/pull/961
• Add the ruff PL checks by @henryiii in https://github.com/pypa/packaging/pull/964
• Enable Ruff ARG rules by @henryiii in https://github.com/pypa/packaging/pull/958
• Ruff PT code (pytest) by @henryiii in https://github.com/pypa/packaging/pull/960
• Add ruff DTZ by @henryiii in https://github.com/pypa/packaging/pull/968
• Add ruff BLE by @henryiii in https://github.com/pypa/packaging/pull/967
• Add the ruff SIM checks by @henryiii in https://github.com/pypa/packaging/pull/966
• Adding ruff PERF by @henryiii in https://github.com/pypa/packaging/pull/969
• Move some config into coverage config by @henryiii in https://github.com/pypa/packaging/pull/971
• Check ruff C4 by @henryiii in https://github.com/pypa/packaging/pull/962
• Adding ruff T20 by @henryiii in https://github.com/pypa/packaging/pull/972
• Add a tests pass job by @henryiii in https://github.com/pypa/packaging/pull/977
• Add ruff TC by @henryiii in https://github.com/pypa/packaging/pull/980
• Adding part of ruff RET by @henryiii in https://github.com/pypa/packaging/pull/979
• Reorder mypy check by @henryiii in https://github.com/pypa/packaging/pull/983
• Enable ruff ALL by @henryiii in https://github.com/pypa/packaging/pull/984
• Link back to repo/source in furo by @henryiii in https://github.com/pypa/packaging/pull/991
• Add case insensitivity tests for arbitrary equality by @notatallshaw in https://github.com/pypa/packaging/pull/975
• Synchronize documentation and code for markers by @zahlman in https://github.com/pypa/packaging/pull/1008
• Use partition in _parse_project_urls by @henryiii in https://github.com/pypa/packaging/pull/1013
• auto-skip the dependabot PRs in the release changelog generation by @henryiii in https://github.com/pypa/packaging/pull/1016
• Update unreleased section in changelog by @henryiii in https://github.com/pypa/packaging/pull/1017
• Fix PR role to match extlinks by @hugovk in https://github.com/pypa/packaging/pull/1020
• Mention new parts in README by @henryiii in https://github.com/pypa/packaging/pull/1023
• Replace a couple of asserts with else by @henryiii in https://github.com/pypa/packaging/pull/1027
• Simplify and/or check a little more by @henryiii in https://github.com/pypa/packaging/pull/1031
• Use slim runner for all check by @henryiii in https://github.com/pypa/packaging/pull/1021
• Use typos instead of codespell by @henryiii in https://github.com/pypa/packaging/pull/1015
• Update changelog with recent additions by @henryiii in https://github.com/pypa/packaging/pull/1034
• Publish to PyPI via GitHub CI by @EpicWink in https://github.com/pypa/packaging/pull/893
• Use prek for faster pre-commit lint step by @henryiii in https://github.com/pypa/packaging/pull/1037
• Add help text to noxfile by @henryiii in https://github.com/pypa/packaging/pull/1038
• Update licenses to 3.27 by @henryiii in https://github.com/pypa/packaging/pull/1036
• Use relative import in packaging.licenses by @notatallshaw in https://github.com/pypa/packaging/pull/1039
• Add zizmor and tighten up CI by @henryiii in https://github.com/pypa/packaging/pull/1035
• Fix release script by @henryiii in https://github.com/pypa/packaging/pull/1040
• Fix using a dev version (again) by @henryiii in https://github.com/pypa/packaging/pull/1041
• Fix type hint of function used with contextlib.contextmanager by @SpecLad in https://github.com/pypa/packaging/pull/1046
• Always run tests by @henryiii in https://github.com/pypa/packaging/pull/1044
• Fix a changelog number by @henryiii in https://github.com/pypa/packaging/pull/1042
• Fix the publish job by @henryiii in https://github.com/pypa/packaging/pull/1043
• Get the correct tag on publish by @henryiii in https://github.com/pypa/packaging/pull/1045
• Test on first public release of CPython 3.11 and newer by @henryiii in https://github.com/pypa/packaging/pull/1056
• Fix publication job (again) by @henryiii in https://github.com/pypa/packaging/pull/1051
• Use actionlint to check CI workflows by @miketheman in https://github.com/pypa/packaging/pull/1052
• Fix formatting of distribution types in metadata.rst by @brettcannon in https://github.com/pypa/packaging/pull/1053

New Contributors

• @cdce8p made their first contribution in https://github.com/pypa/packaging/pull/881
• @dholth made their first contribution in https://github.com/pypa/packaging/pull/860
• @trim21 made their first contribution in https://github.com/pypa/packaging/pull/908
• @yarikoptic made their first contribution in https://github.com/pypa/packaging/pull/910
• @cthoyt made their first contribution in https://github.com/pypa/packaging/pull/868
• @bwoodsend made their first contribution in https://github.com/pypa/packaging/pull/879
• @stefan6419846 made their first contribution in https://github.com/pypa/packaging/pull/921
• @bearomorphism made their first contribution in https://github.com/pypa/packaging/pull/913
• @EpicWink made their first contribution in https://github.com/pypa/packaging/pull/922
• @Liam-DeVoe made their first contribution in https://github.com/pypa/packaging/pull/932
• @subhajitsaha01 made their first contribution in https://github.com/pypa/packaging/pull/930
• @ncoghlan made their first contribution in https://github.com/pypa/packaging/pull/973
• @zahlman made their first contribution in https://github.com/pypa/packaging/pull/1008
• @JP-Ellis made their first contribution in https://github.com/pypa/packaging/pull/939

Since last RC

Fixes:

• Restore ._version as a compat shim by @henryiii in https://github.com/pypa/packaging/pull/1062

Performance:

• Dual replace by @henryiii in https://github.com/pypa/packaging/pull/1064

Documentaiton:

• Prepare for 26.0 final by @henryiii in https://github.com/pypa/packaging/pull/1063

Full Changelog: https://github.com/pypa/packaging/compare/26.0rc3...26.0