ruff 0.17.2

on Python PyPI

Release Notes

Released on 2026-10-22.

Preview features

• [complexity] Add unnecessary-regular-expression-compile (#25533)

Bug fixes

• Avoid syntax errors for type variables with starred constraints (UP040, UP046, UP047, RUF053) (#28362)
• [pydocstyle] Treat backslash-escaped *args and **kwargs as documented (D417) (#29536)
• [pylint] Avoid false positive on starred elements (PLE0643) (#29483)
• [pylint] Mark fixes unsafe when deleting comments (PLR5501, PLW0120) (#29414)
• [pyupgrade] Mark fix unsafe when deleting comments (UP035) (#29413)

Performance

• Avoid intermediate names in lint name resolution (#29506)
• Prefilter bidirectional Unicode checks by UTF-8 leading bytes (#29561)
• Share postfix parsing and reduce expression copies (#29480)

Configuration

• [pylint] Add a configurable allowlist for magic-value-comparison (PLR2004) (#18961)

Documentation

• Clarify documentation and correct stale guidance (#29374)
• [pyupgrade] Remove mentions of variance related to fix safety (UP040, UP047) (#29592)

Contributors

• @fixfon
• @MichaReiser
• @zaniebot
• @FrancescoPezzella
• @anishgirianish
• @rajveer3x
• @charliermarsh
• @LckyLike
• @DaniBodor

Install ruff 0.17.2

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ruff/releases/download/0.17.2/ruff-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ruff/releases/download/0.17.2/ruff-installer.ps1 | iex"

Download ruff 0.17.2

Verifying GitHub Artifact Attestations

The artifacts in this release have attestations generated with GitHub Artifact Attestations. These can be verified by using the GitHub CLI:

gh attestation verify <file-path of downloaded artifact> --repo astral-sh/ruff

You can also download the attestation from GitHub and verify against that directly:

gh attestation verify <file-path of downloaded artifact> --bundle <file-path of downloaded attestation>