ruff 0.16.6

on Python PyPI

Release Notes

Released on 2026-09-03.

Preview features

• Move pytest-fixture-autouse to the restriction category (#28219)
• [flake8-pytest-style] Add an autofix for PT020 (#27993)
• [flake8-tidy-imports] Prevent fix loop between TID254 and TID255 (#28262)
• [isort] Exclude pragma comments from line length calculation (I001) (#27313)

Bug fixes

• Validate unary expressions when parsing (#28233)
• [flake8-async, pylint] Recognize builtins.open (ASYNC230, PLW1514) (#28021)
• [flake8-bugbear] Fix panic on match subjects (B031) (#27781)
• [flake8-datetimez] Reject tzinfo=None for datetime bounds (DTZ901) (#28022)
• [flake8-pytest-style] Avoid duplicate PT017 diagnostics (#27918)
• [ruff] Remove lint.external hint for Ruff-specific suppressions (RUF102) (#27923)

Rule changes

• [flake8-use-pathlib] Add display-only fix for os.listdir (PTH208) (#28027)

Documentation

• Add another example and glob reference for lint.per-file-ignores (#28106)
• Add duplicate work guidance (#28229)
• [flake8-async] Document thread offloading (ASYNC240) (#28008)
• [pyupgrade] Clarify default encoding argument handling (UP012) (#27315)

Other changes

• Allow unary plus in match patterns on Python 3.15 (#28231)

Contributors

• @flying-sheep
• @pikammmmm
• @fly1d
• @waterWang
• @Pierre-Sassoulas
• @ntBre
• @jelle-openai
• @ericbuehl
• @tjkuson
• @AbhinavMir
• @Whning0513
• @chirizxc

Install ruff 0.16.6

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ruff/releases/download/0.16.6/ruff-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ruff/releases/download/0.16.6/ruff-installer.ps1 | iex"

Download ruff 0.16.6

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>