Sourced from packaging's releases.

26.2

What's Changed

Fixes:

• Fix incorrect sysconfig var name for pyemscripten by @​ryanking13 in pypa/packaging#1160
• Make Version, Specifier, SpecifierSet, Tag, Marker, and Requirement pickle-safe and backward-compatible with pickles created in 25.0-26.1 (including references to the removed packaging._structures module) by @​eachimei and @​henryiii in pypa/packaging#1163, pypa/packaging#1168, pypa/packaging#1170, and pypa/packaging#1171
• fix: re-export ExceptionGroup for now by @​henryiii in pypa/packaging#1164

Documentation:

• docs: add errors section and fix missing details by @​henryiii in pypa/packaging#1159
• docs(dev): document property-based test suite by @​r266-tech in pypa/packaging#1167
• Fix typo in DirectUrl documentation by @​sbidoul in pypa/packaging#1169
• docs(specifiers): add is_unsatisfiable() usage example by @​r266-tech in pypa/packaging#1166

Internal:

• Enable the auditor persona on zizmor by @​henryiii in pypa/packaging#1158
• Test new pickle guarantees by @​henryiii in pypa/packaging#1174
• Use native uv integration in rtd by @​henryiii in pypa/packaging#1175

New Contributors

• @​ryanking13 made their first contribution in pypa/packaging#1160
• @​eachimei made their first contribution in pypa/packaging#1163

Full Changelog: https://github.com/pypa/packaging/compare/26.1...26.2

26.1

Features:

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

Behavior adaptations:

• Narrow exclusion of pre-releases for <V.postN to match spec by @​notatallshaw in pypa/packaging#1140

... (truncated)

Sourced from packaging's changelog.

26.2 - 2026-04-24

Fixes:

Fix incorrect sysconfig var name for pyemscripten in (:pull:1160)
Make Version, Specifier, SpecifierSet, Tag, Marker, and Requirement pickle-safe

and backward-compatible with pickles created in 25.0-26.1 (including references to the removed

packaging._structures module) (:pull:1163, :pull:1168, :pull:1170, :pull:1171)
Re-export ExceptionGroup in metadata for now in (:pull:1164)

Documentation:

Add errors section and fix missing details in (:pull:1159)
Document our property-based test suite in (:pull:1167)
Fix a DirectUrl typo in (:pull:1169)
Add example of is_unsatisfiable in (:pull:1166)

Internal:

Enable the auditor persona on zizmor in (:pull:1158)
Test new pickle guarantees in (:pull:1174)
Use new native ReadTheDocs uv integration in (:pull:1175)

26.1 - 2026-04-14

Features:

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

Behavior adaptations:

• Narrow exclusion of pre-releases for <V.postN to match spec in (:pull:1140)
• Narrow exclusion of post-releases for >V to match spec in (:pull:1141)
• Rename format_full_version to _format_full_version to make it visibly private in (:pull:1125)
• Restrict local version to ASCII in (:pull:1102)

Pylock (PEP 751) updates:

... (truncated)

• 84a87ee Bump for release
• 4a616b6 docs: a few more updates to prepare for 26.2 (#1176)
• 9de6f44 ci: use native uv integration in rtd (#1175)
• bc76e14 chore: update changelog for 26.2 (#1161)
• 3f00091 tests: add a pickle check (#1174)
• 48a8a06 fix: make Requirements/Markers pickle-safe (#1171)
• 823b44e fix: make Tags pickle-safe (#1170)
• 4bed32d fix: make Specifier / SpecifierSet pickle-safe (#1168)
• 963118e fix: re-export ExceptionGroup for now (#1164)
• 66e34a8 docs(specifiers): add is_unsatisfiable() usage example (#1166)
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