ruff 0.15.8

on Python PyPI

Release Notes

Released on 2026-03-26.

Preview features

• [ruff] New rule unnecessary-if (RUF050) (#24114)
• [ruff] New rule useless-finally (RUF072) (#24165)
• [ruff] New rule f-string-percent-format (RUF073): warn when using % operator on an f-string (#24162)
• [pyflakes] Recognize frozendict as a builtin for Python 3.15+ (#24100)

Bug fixes

• [flake8-async] Use fully-qualified anyio.lowlevel import in autofix (ASYNC115) (#24166)
• [flake8-bandit] Check tuple arguments for partial paths in S607 (#24080)
• [pyflakes] Skip undefined-name (F821) for conditionally deleted variables (#24088)
• E501/W505/formatter: Exclude nested pragma comments from line width calculation (#24071)
• Fix %foo? parsing in IPython assignment expressions (#24152)
• analyze graph: resolve string imports that reference attributes, not just modules (#24058)

Rule changes

• [eradicate] ignore ty: ignore comments in ERA001 (#24192)
• [flake8-bandit] Treat sys.executable as trusted input in S603 (#24106)
• [flake8-self] Recognize Self annotation and self assignment in SLF001 (#24144)
• [pyflakes] F507: Fix false negative for non-tuple RHS in %-formatting (#24142)
• [refurb] Parenthesize generator arguments in FURB142 fixer (#24200)

Performance

• Speed up diagnostic rendering (#24146)

Server

• Warn when Markdown files are skipped due to preview being disabled (#24150)

Documentation

• Clarify extend-ignore and extend-select settings documentation (#24064)
• Mention AI policy in PR template (#24198)

Other changes

• Use trusted publishing for NPM packages (#24171)

Contributors

• @bitloi
• @Sim-hu
• @mvanhorn
• @chinar-amrutkar
• @markjm
• @RenzoMXD
• @vivekkhimani
• @seroperson
• @moktamd
• @charliermarsh
• @ntBre
• @zanieb
• @dylwil3
• @MichaReiser

Install ruff 0.15.8

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ruff/releases/download/0.15.8/ruff-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ruff/releases/download/0.15.8/ruff-installer.ps1 | iex"

Download ruff 0.15.8

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>