Bump packaging from 26.2 to 26.3

[dependabot]

Bumps packaging from 26.2 to 26.3.

Release notes

Sourced from packaging's releases.

26.3

What's Changed

Features

• Add a public VersionRange API and SpecifierSet.to_range(), representing the versions a specifier set accepts as an interval set that supports intersection, union, difference, complement, set relations, membership tests, and filtering. VersionRange.to_specifier_set() converts a range back to a SpecifierSet where a PEP 440 form exists. (#1267, #1270, #1298)
• PEP 808: accept Metadata-Version: 2.6. (#1194)
• Add a limit argument to parse_tag() for compressed tag sets. (#1220)
• Add a prefer_sdist_predicate argument to Pylock.select() to prefer source distributions over wheels for selected packages. (#1334)
• Add pure_python_tags() to generate the pure-Python tags for a Python version without touching the running platform. (#1346)
• Add SpecifierSet.is_subset(), SpecifierSet.is_superset(), and SpecifierSet.is_disjoint(), which compare the versions two specifier sets accept. (#1313)

Behavior adaptations

• Drop support for Python 3.8; packaging now requires Python 3.9 or later. (#1157)
• Prefer native linux_* platform tags over manylinux and musllinux tags on Linux. (#160)

Fixes for versions and specifiers

• Raise InvalidVersion instead of TypeError when Version is given a non-string. (#1319)
• Raise InvalidVersion for non-string pre-release letters passed to Version.from_parts. (#1241)
• Fix an AttributeError when hashing internally trimmed versions. (#1242)
• Fix SpecifierSet.is_unsatisfiable for post-release boundary intersections. (#1257)

Fixes for requirements and markers

• Make Requirement.__hash__ consistent with __eq__ for trailing-zero-equivalent specifiers (e.g. foo==1.0.0 and foo==1.0.0.0), so equal requirements hash equal and deduplicate in sets and dicts. (#1232)
• Normalize requested extra names before comparing or hashing requirements. (#644)
• Preserve a Requirement's specifier prereleases override across a pickle round trip. (#1204)
• Raise InvalidRequirement instead of InvalidSpecifier when a requirement contains an invalid specifier. (#1332)
• Clarify the error for post-release prefix wildcards like ==1.0.post1.*. (#1299)
• Preserve quoting semantics when serializing marker values, so round-tripped markers parse back to the same marker. (#1213)
• Keep the parentheses of a nested group when serializing markers. (#1316)
• Normalize extra and dependency_groups values in nested markers at parse time. (#1246, #1310)
• Raise UndefinedComparison when a set-valued variable like extras is used outside the membership form. (#1265)
• Raise UndefinedEnvironmentName (a KeyError subclass) for missing environment keys during marker evaluation. (#1276)
• Wrap malformed string literal errors in InvalidMarker / InvalidRequirement instead of leaking a low-level error. (#1249)
• Reject requirements and markers with a trailing line break. (#1345)

Fixes for metadata and licenses

• Collect all from_email validation errors into one ExceptionGroup instead of raising the first. (#1268)
• Accept the UTF-8 charset case-insensitively in email payloads. (#1330)
• Reject malformed Description-Content-Type values. (#1329)
• Don't rewrite user values that contain {field} placeholders in error messages. (#1327)
• Route multipart email payloads to unparsed instead of asserting. (#1247)
• Make InvalidMetadata and CyclicDependencyGroup picklable. (#1328)
• Fold every line boundary str.splitlines recognizes when writing a header with RFC822Message. (#1356)

... (truncated)

Changelog

Sourced from packaging's changelog.

26.3 - 2026-08-03

Features:

Add a public :class:~packaging.ranges.VersionRange API and

:meth:SpecifierSet.to_range() <packaging.specifiers.SpecifierSet.to_range>,

representing the versions a specifier set accepts as an interval set that

supports intersection, union, difference, complement, set relations,

membership tests, and filtering.

:meth:~packaging.ranges.VersionRange.to_specifier_set converts a range back

to a :class:~packaging.specifiers.SpecifierSet where a PEP 440 form exists.

(:pull:1267, :pull:1270, :pull:1298)
PEP 808: accept Metadata-Version: 2.6. (:pull:1194)
Add a limit argument to parse_tag() for compressed tag sets.

(:issue:1220)
Add a prefer_sdist_predicate argument to Pylock.select() to prefer

source distributions over wheels for selected packages. (:pull:1334)
Add :func:~packaging.tags.pure_python_tags to generate the pure-Python

tags for a Python version without touching the running platform.

(:pull:1346)
Add :meth:SpecifierSet.is_subset() <packaging.specifiers.SpecifierSet.is_subset>, :meth:~packaging.specifiers.SpecifierSet.is_superset,

and :meth:~packaging.specifiers.SpecifierSet.is_disjoint, which compare the

versions two specifier sets accept. (:pull:1313)

Behavior adaptations:

Drop support for Python 3.8; packaging now requires Python 3.9 or later.

(:pull:1157)
Prefer native linux_* platform tags over manylinux and musllinux

tags on Linux. (:issue:160)

Fixes for versions and specifiers:

Raise InvalidVersion instead of TypeError when Version is given a

non-string. (:pull:1319)
Raise InvalidVersion for non-string pre-release letters passed to

Version.from_parts. (:pull:1241)
Fix an AttributeError when hashing internally trimmed versions.

(:pull:1242)
Fix SpecifierSet.is_unsatisfiable for post-release boundary

intersections. (:pull:1257)

Fixes for requirements and markers:

Make Requirement.__hash__ consistent with __eq__ for

trailing-zero-equivalent specifiers (e.g. foo==1.0.0 and

foo==1.0.0.0), so equal requirements hash equal and deduplicate in

sets and dicts. (:pull:1232)

</tr></table>

... (truncated)

Commits

• 929fd4b Bump for release
• f300ebf chore(deps): bump the pre-commit group with 5 updates (#1357)
• f91d975 ci(downstream): bump hatchling to 1.31.0 and fix its pytest rootdir (#1361)
• b1a7124 chore(deps): bump the github-actions group with 7 updates (#1358)
• 2d873eb fix(metadata): fold every line boundary when writing headers (#1356)
• 413d006 docs: changelog for 26.3 (#1343)
• 4eb0753 docs(metadata): explain selective field validation (#1342)
• 77e9ed4 feat(tags): add pure Python tag generator (#1346)
• 7cea5e8 ci: drop 3.13t on Windows (3.13.14t may fail to build, run takes 9 minutes) (...
• 45a8b34 docs: add missing versionadded/versionchanged directives (#1344)
• Additional commits viewable in compare view

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.99%. Comparing base (b084084) to head (ed9adba).
⚠️ Report is 4 commits behind head on master.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #13374   +/-   ##
=======================================
  Coverage   98.99%   98.99%           
=======================================
  Files         132      132           
  Lines       49290    49290           
  Branches     2566     2566           
=======================================
  Hits        48795    48795           
  Misses        371      371           
  Partials      124      124           

Flag	Coverage Δ
Autobahn	22.06% <ø> (ø)
CI-GHA	98.90% <ø> (ø)
OS-Linux	98.68% <ø> (ø)
OS-Windows	97.03% <ø> (ø)
OS-macOS	97.93% <ø> (ø)
Py-3.10	98.12% <ø> (ø)
Py-3.11	98.38% <ø> (ø)
Py-3.12	98.47% <ø> (ø)
Py-3.13	98.45% <ø> (ø)
Py-3.14	98.46% <ø> (-0.01%)	⬇️
Py-3.14t	97.56% <ø> (ø)
Py-pypy-3.11	97.40% <ø> (-0.01%)	⬇️
VM-macos	97.93% <ø> (ø)
VM-ubuntu	98.68% <ø> (ø)
VM-windows	97.03% <ø> (ø)
cython-coverage	38.13% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

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[codspeed-hq]

Merging this PR will not alter performance

✅ 84 untouched benchmarks
⏩ 83 skipped benchmarks¹

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_{Comparing dependabot/pip/packaging-26.3 (ed9adba) with master (b084084)}

Footnotes

1. 83 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩