This release includes the Beta version of the Ruff formatter — an extremely fast, Black-compatible Python formatter. Try it today with ruff format! Check out the blog post and read the docs.

Changes

Preview features

• [pylint] Implement non-ascii-module-import (C2403) (#8056)
• [pylint] implement non-ascii-name (C2401) (#8038)
• [pylint] Implement unnecessary-lambda (W0108) (#7953)
• [refurb] Implement read-whole-file (FURB101) (#7682)
• Add fix for E223, E224, and E242 (#8143)
• Add fix for E225, E226, E227, and E228 (#8136)
• Add fix for E252 (#8142)
• Add fix for E261 (#8114)
• Add fix for E273 and E274 (#8144)
• Add fix for E275 (#8133)
• Update SIM401 to catch ternary operations (#7415)
• Update E721 to allow is and is not for direct type comparisons (#7905)

Rule changes

• Add backports.strenum to deprecated-imports (#8113)
• Update SIM112 to ignore https_proxy, http_proxy, and no_proxy (#8140)
• Update fix for literal-membership (PLR6201) to be unsafe (#8097)
• Update fix for mutable-argument-defaults (B006) to be unsafe (#8108)

Formatter

• Change line-ending default to auto (#8057)
• Respect parenthesized generators in has_own_parentheses (#8100)
• Add caching to formatter (#8089)
• Remove --line-length option from format command (#8131)
• Add formatter to line-length documentation (#8150)
• Warn about incompatible formatter options (#8088)
• Fix range of unparenthesized tuple subject in match statement (#8101)
• Remove experimental formatter warning (#8148)
• Don't move type param opening parenthesis comment (#8163)
• Update versions in format benchmark script (#8110)
• Avoid loading files for cached format results (#8134)

CLI

• Show the ruff format command in help menus (#8167)
• Add ruff version command with long version display (#8034)

Configuration

• New pycodestyle.max-line-length option (#8039)

Bug fixes

• Detect sys.version_info slices in outdated-version-block (#8112)
• Avoid if-else simplification for TYPE_CHECKING blocks (#8072)
• Avoid false-positive print separator diagnostic with starred argument (#8079)

Documentation

• Fix message for too-many-arguments lint (#8092)
• Fix extend-unsafe-fixes and extend-safe-fixes example (#8139)
• Add links to flake8-import-conventions options (#8115)
• Rework the documentation to incorporate the Ruff formatter (#7732)
• Fix Options JSON schema description (#8081)
• Fix typo (pytext -> pytest) (#8117)
• Improve magic-value-comparison example in docs (#8111)

Contributors

• @Cjkjvfnby
• @Flowrey
• @MichaReiser
• @SavchenkoValeriy
• @charliermarsh
• @cjolowicz
• @clemux
• @dhruvmanila
• @diceroll123
• @flying-sheep
• @gouzil
• @harupy
• @reswqa
• @siboehm
• @zanieb