astral-sh/ruff 0.17.3

on GitHub

Release Notes

Released on 2026-10-26.

Preview features

• [suspicious] Add shared-clock-mock (#29074)

Bug fixes

• [pyupgrade] Avoid incorrect conversions to f-strings (UP032) (#25485)

Performance

• Buffer stdout in ruff format (#29631)
• Specialize ASCII identifier lexing (#29503)
• Speed up identifier and keyword lexing (#29463)

Documentation

• [flake8-bandit] Describe what the rule actually checks for httpx (S113) (#27936)

Contributors

• @itsvedantkumar
• @charliermarsh
• @anishgirianish

Install ruff 0.17.3

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ruff/releases/download/0.17.3/ruff-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ruff/releases/download/0.17.3/ruff-installer.ps1 | iex"

Download ruff 0.17.3

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>