Ruff Files

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

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

Install prebuilt binaries via powershell script

:::sh
powershell -ExecutionPolicy Bypass -c "irm https://github.com/astral-sh/ruff/releases/download/0.14.9/ruff-installer.ps1 | iex"

Download ruff 0.14.9