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In preview, Ruff now enables a significantly expanded default rule set of 412
rules, up from the stable default set of 59 rules. The new rules are mostly a
superset of the stable defaults, with the exception of these rules, which are
removed from the preview defaults:
Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>
Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%
✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (2021464) to head (b421755). ⚠️ Report is 1 commits behind head on master.
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This PR contains the following updates:
0.15.1→0.15.2Release Notes
astral-sh/ruff (ruff)
v0.15.2Compare Source
Released on 2026-02-19.
Preview features
Expand the default rule set (#23385)
In preview, Ruff now enables a significantly expanded default rule set of 412
rules, up from the stable default set of 59 rules. The new rules are mostly a
superset of the stable defaults, with the exception of these rules, which are
removed from the preview defaults:
multiple-imports-on-one-line(E401)module-import-not-at-top-of-file(E402)module-import-not-at-top-of-file(E701)multiple-statements-on-one-line-semicolon(E702)useless-semicolon(E703)none-comparison(E711)true-false-comparison(E712)not-in-test(E713)not-is-test(E714)type-comparison(E721)lambda-assignment(E731)ambiguous-variable-name(E741)ambiguous-class-name(E742)ambiguous-function-name(E743)undefined-local-with-import-star(F403)undefined-local-with-import-star-usage(F405)undefined-local-with-nested-import-star-usage(F406)forward-annotation-syntax-error(F722)If you use preview and prefer the old defaults, you can restore them with
configuration like:
If you do give them a try, feel free to share your feedback in the GitHub
discussion!
[
flake8-pyi] Also check string annotations (PYI041) (#19023)Bug fixes
flake8-async] Fixin_async_contextlogic (#23426)ruff] Fix forRUF102should delete entire comment (#23380)ruff] Suppress diagnostic for strings with backslashes in interpolations before Python 3.12 (RUF027) (#21069)flake8-bugbear] FixB023false positive for immediately-invoked lambdas (#23294)Rule changes
flake8-executable] Allow global flags in uv shebangs (EXE003) (#22582)pyupgrade] Fix handling oftyping.{io,re}(UP035) (#23131)ruff] DetectPLC0207on chainedstr.split()calls (#23275)CLI
noqawarning (#23270)Configuration
Documentation
Q004to the list of conflicting rules (#23340)ruff] Expandlint.externaldocs and add sub-diagnostic (RUF100,RUF102) (#23268)Contributors
Configuration
📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).
🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.
♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.
🔕 Ignore: Close this PR and you won't be reminded about this update again.
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