packaging 26.1

Features:

• PEP 783: add handling for Emscripten wheel tags by @hoodmane in https://github.com/pypa/packaging/pull/804 (old name used in implementation, will be fixed in next release)
• PEP 803: add handling for the abi3.abi3t free-threading tag by @ngoldbaum in https://github.com/pypa/packaging/pull/1099
• PEP 723: add packaging.dependency_groups module, based on the dependency-groups package by @sirosen in https://github.com/pypa/packaging/pull/1065
• Add the packaging.direct_url module by @sbidoul in https://github.com/pypa/packaging/pull/944
• Add the packaging.errors module by @henryiii in https://github.com/pypa/packaging/pull/1071
• Add SpecifierSet.is_unsatisfiable using ranges (new internals that will be expanded in future versions) by @notatallshaw in https://github.com/pypa/packaging/pull/1119
• Add create_compatible_tags_selector to select compatible tags by @sbidoul in https://github.com/pypa/packaging/pull/1110
• Add a key argument to SpecifierSet.filter() by @frostming in https://github.com/pypa/packaging/pull/1068
• Support & and | for Marker's by @henryiii in https://github.com/pypa/packaging/pull/1146
• Normalize Version.__replace__ and add Version.from_parts by @henryiii in https://github.com/pypa/packaging/pull/1078
• Add an option to validate compressed tag set sort order in parse_wheel_filename by @r266-tech in https://github.com/pypa/packaging/pull/1150

Behavior adaptations:

• Narrow exclusion of pre-releases for <V.postN to match spec by @notatallshaw in https://github.com/pypa/packaging/pull/1140
• Narrow exclusion of post-releases for >V to match spec by @notatallshaw in https://github.com/pypa/packaging/pull/1141
• Rename format_full_version to _format_full_version to make it visibly private by @r266-tech in https://github.com/pypa/packaging/pull/1125
• Restrict local version to ASCII by @henryiii in https://github.com/pypa/packaging/pull/1102

Pylock (PEP 751) updates:

• Add pylock select function by @sbidoul in https://github.com/pypa/packaging/pull/1092
• Document pylock select() method and PylockSelectError by @r266-tech in https://github.com/pypa/packaging/pull/1153
• Add filename property to PackageSdist and PackageWheel, more validation by @sbidoul in https://github.com/pypa/packaging/pull/1095
• Give preference to path over url by @sbidoul in https://github.com/pypa/packaging/pull/1128
• Validate name/version consistency in file names by @sbidoul in https://github.com/pypa/packaging/pull/1114

Fixes:

• Fix > comparison for versions with dev+local segments by @veeceey in https://github.com/pypa/packaging/pull/1097
• Fix incorrect self-comparison for InfinityType and NegativeInfinityType by @bysiber in https://github.com/pypa/packaging/pull/1093
• Canonicalize when deduplicating specifiers in SpecifierSet by @notatallshaw in https://github.com/pypa/packaging/pull/1109
• Fix charset error message formatting by @notatallshaw in https://github.com/pypa/packaging/pull/1121
• Handle the key parameter in SpecifierSet.filter when specifiers are empty and prerelease is False by @notatallshaw in https://github.com/pypa/packaging/pull/1096
• Standardize inner components of repr output by @henryiii in https://github.com/pypa/packaging/pull/1090
• Specifier's === uses original string, not normalized, when available by @notatallshaw in https://github.com/pypa/packaging/pull/1124
• Propagate int-max-str-digits ValueError by @notatallshaw in https://github.com/pypa/packaging/pull/1155

Performance:

• Add fast path for parsing simple versions (digits and dots only) by @notatallshaw in https://github.com/pypa/packaging/pull/1082
• Add fast path for Version to Version comparison by skipping _key property by @notatallshaw in https://github.com/pypa/packaging/pull/1083
• Cache Version hash value in dedicated slot by @notatallshaw in https://github.com/pypa/packaging/pull/1118
• Overhaul _cmpkey to remove use of custom objects by @notatallshaw in https://github.com/pypa/packaging/pull/1116
• Skip __replace__ in Specifier comparison if not needed by @notatallshaw in https://github.com/pypa/packaging/pull/1081
• SpecifierSet use tuple instead of frozenset for _specs by @notatallshaw in https://github.com/pypa/packaging/pull/1108
• Speed up complex SpecifierSet filtering by implementing cost-based ordering by @notatallshaw in https://github.com/pypa/packaging/pull/1105
• Speed up wildcard comparison by @notatallshaw in https://github.com/pypa/packaging/pull/1111
• Stream PEP440 filtering in SpecifierSet.filter by @notatallshaw in https://github.com/pypa/packaging/pull/1076
• Add __slots__ to Marker by @henryiii in https://github.com/pypa/packaging/pull/1147
• Simply Specifier regex by @sirosen in https://github.com/pypa/packaging/pull/1106
• Skip using the hash property internally by @notatallshaw in https://github.com/pypa/packaging/pull/1115

Internal:

• Add downstream testing by @henryiii in https://github.com/pypa/packaging/pull/1049
• Benchmarking suite by @henryiii in https://github.com/pypa/packaging/pull/1059
• Benchmark variance reduction by @notatallshaw in https://github.com/pypa/packaging/pull/1107
• Add property-based tests for PEP 440 by @notatallshaw in https://github.com/pypa/packaging/pull/1144
• Clean up a few collections.namedtuple in tests by @henryiii in https://github.com/pypa/packaging/pull/1070
• Do not reload the tags module in tests by @henryiii in https://github.com/pypa/packaging/pull/1152
• Limit dir() / tab-completion in REPL by @henryiii in https://github.com/pypa/packaging/pull/1011
• Add more __all__/__dir__ by @henryiii in https://github.com/pypa/packaging/pull/1069
• Cleanup pre-commit a bit by @henryiii in https://github.com/pypa/packaging/pull/1080
• Pin pre-commit file, use dependabot by @henryiii in https://github.com/pypa/packaging/pull/1133
• Remove sphinx-toolbox by @henryiii in https://github.com/pypa/packaging/pull/1135
• Use docs group, faster readthedocs by @henryiii in https://github.com/pypa/packaging/pull/1061
• Add free-threaded Python to CI by @henryiii in https://github.com/pypa/packaging/pull/1098
• Simplify combining SpecifierSet.prereleases by @notatallshaw in https://github.com/pypa/packaging/pull/1073
• Use direct operator methods in _compare_compatible by @notatallshaw in https://github.com/pypa/packaging/pull/1100
• Remove unnecessary if statement in Specifier.prereleases by @notatallshaw in https://github.com/pypa/packaging/pull/1074
• Remove unneeded nesting in Specifier.prereleases by @notatallshaw in https://github.com/pypa/packaging/pull/1072

Documentation:

• Fix documentation: grammar, typos, formatting, and outdated references by @DimitriPapadopoulos in https://github.com/pypa/packaging/pull/1084
• Fix versionadded for Version.from_parts() by @Jackenmen in https://github.com/pypa/packaging/pull/1134
• Document & and | operators for combining Marker objects by @r266-tech in https://github.com/pypa/packaging/pull/1151
• Expand and clean up Version documentation by @henryiii in https://github.com/pypa/packaging/pull/1089
• Move license docs inline by @henryiii in https://github.com/pypa/packaging/pull/1131
• Move markers inline by @henryiii in https://github.com/pypa/packaging/pull/1104
• Move tags docs to inline by @henryiii in https://github.com/pypa/packaging/pull/1130
• Move utilities inline, like other modules by @henryiii in https://github.com/pypa/packaging/pull/1103

Benchmarks

Performance improvements since 26.0, from the new integrated benchmark suite:

uv run asv run 26.0..HEAD

New Contributors

• @veeceey made their first contribution in https://github.com/pypa/packaging/pull/1097
• @bysiber made their first contribution in https://github.com/pypa/packaging/pull/1093
• @sirosen made their first contribution in https://github.com/pypa/packaging/pull/1106
• @Jackenmen made their first contribution in https://github.com/pypa/packaging/pull/1134
• @ngoldbaum made their first contribution in https://github.com/pypa/packaging/pull/1099
• @r266-tech made their first contribution in https://github.com/pypa/packaging/pull/1151
• @hoodmane made their first contribution in https://github.com/pypa/packaging/pull/804

Full Changelog: https://github.com/pypa/packaging/compare/26.0...26.1