Sourced from ruff's releases.

0.14.9

Release Notes

Released on 2025-12-11.

Preview features

• [ruff] New RUF100 diagnostics for unused range suppressions (#21783)
• [pylint] Detect subclasses of builtin exceptions (PLW0133) (#21382)

Bug fixes

• Fix comment placement in lambda parameters (#21868)
• Skip over trivia tokens after re-lexing (#21895)
• [flake8-bandit] Fix false positive when using non-standard CSafeLoader path (S506). (#21830)
• [flake8-bugbear] Accept immutable slice default arguments (B008) (#21823)

Rule changes

• [pydocstyle] Suppress D417 for parameters with Unpack annotations (#21816)

Performance

• Use memchr for computing line indexes (#21838)

Documentation

• Document *.pyw is included by default in preview (#21885)
• Document range suppressions, reorganize suppression docs (#21884)
• Update mkdocs-material to 9.7.0 (Insiders now free) (#21797)

Contributors

• @​Avasam
• @​MichaReiser
• @​charliermarsh
• @​amyreese
• @​phongddo
• @​prakhar1144
• @​mahiro72
• @​ntBre
• @​LoicRiegel

Install ruff 0.14.9

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/astral-sh/ruff/releases/download/0.14.9/ruff-installer.sh | sh

... (truncated)

Sourced from ruff's changelog.

0.14.9

Released on 2025-12-11.

Preview features

• [ruff] New RUF100 diagnostics for unused range suppressions (#21783)
• [pylint] Detect subclasses of builtin exceptions (PLW0133) (#21382)

Bug fixes

• Fix comment placement in lambda parameters (#21868)
• Skip over trivia tokens after re-lexing (#21895)
• [flake8-bandit] Fix false positive when using non-standard CSafeLoader path (S506). (#21830)
• [flake8-bugbear] Accept immutable slice default arguments (B008) (#21823)

Rule changes

• [pydocstyle] Suppress D417 for parameters with Unpack annotations (#21816)

Performance

• Use memchr for computing line indexes (#21838)

Documentation

• Document *.pyw is included by default in preview (#21885)
• Document range suppressions, reorganize suppression docs (#21884)
• Update mkdocs-material to 9.7.0 (Insiders now free) (#21797)

Contributors

• @​Avasam
• @​MichaReiser
• @​charliermarsh
• @​amyreese
• @​phongddo
• @​prakhar1144
• @​mahiro72
• @​ntBre
• @​LoicRiegel

• 3f63ea4 Prepare 0.14.9 release (#21927)
• c8851ec [ty] Defer all parameter and return type annotations (#21906)
• d442433 [ty] Fix workspace symbols to return members too (#21926)
• c055d66 Document range suppressions, reorganize suppression docs (#21884)
• 7a578ce Ignore ruff:isort like ruff:noqa in new suppressions (#21922)
• 34f7a04 [ty] Handle Definitions in SemanticModel::scope (#21919)
• c9fe4e2 [ty] Attach salsa db when running ide tests for easier debugging (#21917)
• fbeeb05 [ty] Don't show hover for expressions with no inferred type (#21924)
• 4fdb4e8 [ty] avoid unions of generic aliases of the same class in fixpoint (#21909)
• c548ef2 [ty] Squash false positive logs for failing to find builtins as a real module
• Additional commits viewable in compare view

Sourced from mypy's changelog.

Mypy 1.19.1

• Fix noncommutative joins with bounded TypeVars (Shantanu, PR 20345)
• Respect output format for cached runs by serializing raw errors in cache metas (Ivan Levkivskyi, PR 20372)
• Allow types.NoneType in match cases (A5rocks, PR 20383)
• Fix mypyc generator regression with empty tuple (BobTheBuidler, PR 20371)
• Fix crash involving Unpack-ed TypeVarTuple (Shantanu, PR 20323)
• Fix crash on star import of redefinition (Ivan Levkivskyi, PR 20333)
• Fix crash on typevar with forward ref used in other module (Ivan Levkivskyi, PR 20334)
• Fail with an explicit error on PyPy (Ivan Levkivskyi, PR 20389)

Acknowledgements

Thanks to all mypy contributors who contributed to this release:

• A5rocks
• BobTheBuidler
• bzoracler
• Chainfire
• Christoph Tyralla
• David Foster
• Frank Dana
• Guo Ci
• iap
• Ivan Levkivskyi
• James Hilton-Balfe
• jhance
• Joren Hammudoglu
• Jukka Lehtosalo
• KarelKenens
• Kevin Kannammalil
• Marc Mueller
• Michael Carlstrom
• Michael J. Sullivan
• Piotr Sawicki
• Randolf Scholz
• Shantanu
• Sigve Sebastian Farstad
• sobolevn
• Stanislav Terliakov
• Stephen Morton
• Theodore Ando
• Thiago J. Barbalho
• wyattscarpenter

I’d also like to thank my employer, Dropbox, for supporting mypy development.

Mypy 1.18

We’ve just uploaded mypy 1.18.1 to the Python Package Index (PyPI). Mypy is a static type checker for Python. This release includes new features, performance

... (truncated)

• 412c19a Bump version to 1.19.1
• 20aea0a Update changelog for 1.19.1 (#20414)
• 2b23b50 Serialize raw errors in cache metas (#20372)
• f60f90f Fail on PyPy in main instead of setup.py (#20389)
• 58d485b Fail with an explicit error on PyPy (#20384)
• a4b31a2 Allow types.NoneType in match cases (#20383)
• 8a6eff4 [mypyc] fix generator regression with empty tuple (#20371)
• 70eceea Fix noncommutative joins with bounded TypeVars (#20345)
• 3890fc4 Fix crash involving Unpack-ed TypeVarTuple (#20323)
• c93d917 Fix crash on star import of redefinition (#20333)
• Additional commits viewable in compare view

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