Update dependency dev/ruff to v0.5.6 - autoclosed

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
dev/ruff (source, changelog)	==0.0.287 -> ==0.5.6

---

Release Notes

astral-sh/ruff (dev/ruff)

v0.5.6

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Ruff 0.5.6 automatically enables linting and formatting of notebooks in preview mode.
You can opt-out of this behavior by adding *.ipynb to the extend-exclude setting.

[tool.ruff]
extend-exclude = ["*.ipynb"]

Preview features

• Enable notebooks by default in preview mode (#​12621)
• [flake8-builtins] Implement import, lambda, and module shadowing (#​12546)
• [pydoclint] Add docstring-missing-returns (DOC201) and docstring-extraneous-returns (DOC202) (#​12485)

Rule changes

• [flake8-return] Exempt cached properties and other property-like decorators from explicit return rule (RET501) (#​12563)

Server

• Make server panic hook more error resilient (#​12610)
• Use $/logTrace for server trace logs in Zed and VS Code (#​12564)
• Keep track of deleted cells for reorder change request (#​12575)

Configuration

• [flake8-implicit-str-concat] Always allow explicit multi-line concatenations when implicit concatenations are banned (#​12532)

Bug fixes

• [flake8-async] Avoid flagging asyncio.timeouts as unused when the context manager includes asyncio.TaskGroup (#​12605)
• [flake8-slots] Avoid recommending __slots__ for classes that inherit from more than namedtuple (#​12531)
• [isort] Avoid marking required imports as unused (#​12537)
• [isort] Preserve trailing inline comments on import-from statements (#​12498)
• [pycodestyle] Add newlines before comments (E305) (#​12606)
• [pycodestyle] Don't attach comments with mismatched indents (#​12604)
• [pyflakes] Fix preview-mode bugs in F401 when attempting to autofix unused first-party submodule imports in an __init__.py file (#​12569)
• [pylint] Respect start index in unnecessary-list-index-lookup (#​12603)
• [pyupgrade] Avoid recommending no-argument super in slots=True dataclasses (#​12530)
• [pyupgrade] Use colon rather than dot formatting for integer-only types (#​12534)
• Fix NFKC normalization bug when removing unused imports (#​12571)

Other changes

• Consider more stdlib decorators to be property-like (#​12583)
• Improve handling of metaclasses in various linter rules (#​12579)
• Improve consistency between linter rules in determining whether a function is property (#​12581)

v0.5.5

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Preview features

• [fastapi] Implement fastapi-redundant-response-model (FAST001) and fastapi-non-annotated-dependency(FAST002) (#​11579)
• [pydoclint] Implement docstring-missing-exception (DOC501) and docstring-extraneous-exception (DOC502) (#​11471)

Rule changes

• [numpy] Fix NumPy 2.0 rule for np.alltrue and np.sometrue (#​12473)
• [numpy] Ignore NPY201 inside except blocks for compatibility with older numpy versions (#​12490)
• [pep8-naming] Avoid applying ignore-names to self and cls function names (N804, N805) (#​12497)

Formatter

• Fix incorrect placement of leading function comment with type params (#​12447)

Server

• Do not bail code action resolution when a quick fix is requested (#​12462)

Bug fixes

• Fix Ord implementation of cmp_fix (#​12471)
• Raise syntax error for unparenthesized generator expression in multi-argument call (#​12445)
• [pydoclint] Fix panic in DOC501 reported in #​12428 (#​12435)
• [flake8-bugbear] Allow singleton tuples with starred expressions in B013 (#​12484)

Documentation

• Add Eglot setup guide for Emacs editor (#​12426)
• Add note about the breaking change in nvim-lspconfig (#​12507)
• Add note to include notebook files for native server (#​12449)
• Add setup docs for Zed editor (#​12501)

v0.5.4

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Rule changes

• [ruff] Rename RUF007 to zip-instead-of-pairwise (#​12399)

Bug fixes

• [flake8-builtins] Avoid shadowing diagnostics for @override methods (#​12415)
• [flake8-comprehensions] Insert parentheses for multi-argument generators (#​12422)
• [pydocstyle] Handle escaped docstrings within docstring (D301) (#​12192)

Documentation

• Fix GitHub link to Neovim setup (#​12410)
• Fix output-format default in settings reference (#​12409)

v0.5.3

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Ruff 0.5.3 marks the stable release of the Ruff language server and introduces revamped
documentation, including setup guides for your editor of
choice and the language server
itself.

Preview features

• Formatter: Insert empty line between suite and alternative branch after function/class definition (#​12294)
• [pyupgrade] Implement unnecessary-default-type-args (UP043) (#​12371)

Rule changes

• [flake8-bugbear] Detect enumerate iterations in loop-iterator-mutation (B909) (#​12366)
• [flake8-bugbear] Remove discard, remove, and pop allowance for loop-iterator-mutation (B909) (#​12365)
• [pylint] Allow repeated-equality-comparison for mixed operations (PLR1714) (#​12369)
• [pylint] Ignore self and cls when counting arguments (PLR0913) (#​12367)
• [pylint] Use UTF-8 as default encoding in unspecified-encoding fix (PLW1514) (#​12370)

Server

• Build settings index in parallel for the native server (#​12299)
• Use fallback settings when indexing the project (#​12362)
• Consider --preview flag for server subcommand for the linter and formatter (#​12208)

Bug fixes

• [flake8-comprehensions] Allow additional arguments for sum and max comprehensions (C419) (#​12364)
• [pylint] Avoid dropping extra boolean operations in repeated-equality-comparison (PLR1714) (#​12368)
• [pylint] Consider expression before statement when determining binding kind (PLR1704) (#​12346)

Documentation

• Add docs for Ruff language server (#​12344)
• Migrate to standalone docs repo (#​12341)
• Update versioning policy for editor integration (#​12375)

Other changes

• Publish Wasm API to npm (#​12317)

v0.5.2

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Preview features

• Use space separator before parenthesized expressions in comprehensions with leading comments (#​12282)
• [flake8-async] Update ASYNC100 to include anyio and asyncio (#​12221)
• [flake8-async] Update ASYNC109 to include anyio and asyncio (#​12236)
• [flake8-async] Update ASYNC110 to include anyio and asyncio (#​12261)
• [flake8-async] Update ASYNC115 to include anyio and asyncio (#​12262)
• [flake8-async] Update ASYNC116 to include anyio and asyncio (#​12266)

Rule changes

• [flake8-return] Exempt properties from explicit return rule (RET501) (#​12243)
• [numpy] Add np.NAN-to-np.nan diagnostic (#​12292)
• [refurb] Make list-reverse-copy an unsafe fix (#​12303)

Server

• Consider include and extend-include settings in native server (#​12252)
• Include nested configurations in settings reloading (#​12253)

CLI

• Omit code frames for fixes with empty ranges (#​12304)
• Warn about formatter incompatibility for D203 (#​12238)

Bug fixes

• Make cache-write failures non-fatal on Windows (#​12302)
• Treat not operations as boolean tests (#​12301)
• [flake8-bandit] Avoid S310 violations for HTTP-safe f-strings (#​12305)
• [flake8-bandit] Support explicit string concatenations in S310 HTTP detection (#​12315)
• [flake8-bandit] fix S113 false positive for httpx without timeout argument (#​12213)
• [pycodestyle] Remove "non-obvious" allowance for E721 (#​12300)
• [pyflakes] Consider with blocks as single-item branches for redefinition analysis (#​12311)
• [refurb] Restrict forwarding for newline argument in open() calls to Python versions >= 3.10 (#​12244)

Documentation

• Update help and documentation to reflect --output-format full default (#​12248)

Performance

• Use more threads when discovering Python files (#​12258)

v0.5.1

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Preview features

• [flake8-bugbear] Implement mutable-contextvar-default (B039) (#​12113)
• [pycodestyle] Whitespace after decorator (E204) (#​12140)
• [pytest] Reverse PT001 and PT0023 defaults (#​12106)

Rule changes

• Enable token-based rules on source with syntax errors (#​11950)
• [flake8-bandit] Detect httpx for S113 (#​12174)
• [numpy] Update NPY201 to include exception deprecations (#​12065)
• [pylint] Generate autofix for duplicate-bases (PLE0241) (#​12105)

Server

• Avoid syntax error notification for source code actions (#​12148)
• Consider the content of the new cells during notebook sync (#​12203)
• Fix replacement edit range computation (#​12171)

Bug fixes

• Disable auto-fix when source has syntax errors (#​12134)
• Fix cache key collisions for paths with separators (#​12159)
• Make requires-python inference robust to == (#​12091)
• Use char-wise width instead of str-width (#​12135)
• [pycodestyle] Avoid E275 if keyword followed by comma (#​12136)
• [pycodestyle] Avoid E275 if keyword is followed by a semicolon (#​12095)
• [pylint] Skip dummy variables for PLR1704 (#​12190)

Performance

• Remove allocation in parse_identifier (#​12103)
• Use CompactString for Identifier AST node (#​12101)

v0.5.0

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Check out the blog post for a migration guide and overview of the changes!

Breaking changes

See also, the "Remapped rules" section which may result in disabled rules.

• Follow the XDG specification to discover user-level configurations on macOS (same as on other Unix platforms)
• Selecting ALL now excludes deprecated rules
• The released archives now include an extra level of nesting, which can be removed with --strip-components=1 when untarring.
• The release artifact's file name no longer includes the version tag. This enables users to install via /latest URLs on GitHub.

Deprecations

The following rules are now deprecated:

• syntax-error (E999): Syntax errors are now always shown

Remapped rules

The following rules have been remapped to new rule codes:

• blocking-http-call-in-async-function: ASYNC100 to ASYNC210
• open-sleep-or-subprocess-in-async-function: ASYNC101 split into ASYNC220, ASYNC221, ASYNC230, and ASYNC251
• blocking-os-call-in-async-function: ASYNC102 has been merged into ASYNC220 and ASYNC221
• trio-timeout-without-await: TRIO100 to ASYNC100
• trio-sync-call: TRIO105 to ASYNC105
• trio-async-function-with-timeout: TRIO109 to ASYNC109
• trio-unneeded-sleep: TRIO110 to ASYNC110
• trio-zero-sleep-call: TRIO115 to ASYNC115
• repeated-isinstance-calls: PLR1701 to SIM101

Stabilization

The following rules have been stabilized and are no longer in preview:

• mutable-fromkeys-value (RUF024)
• default-factory-kwarg (RUF026)
• django-extra (S610)
• manual-dict-comprehension (PERF403)
• print-empty-string (FURB105)
• readlines-in-for (FURB129)
• if-expr-min-max (FURB136)
• bit-count (FURB161)
• redundant-log-base (FURB163)
• regex-flag-alias (FURB167)
• isinstance-type-none (FURB168)
• type-none-comparison (FURB169)
• implicit-cwd (FURB177)
• hashlib-digest-hex (FURB181)
• list-reverse-copy (FURB187)
• bad-open-mode (PLW1501)
• empty-comment (PLR2044)
• global-at-module-level (PLW0604)
• misplaced-bare-raise (PLE0744)
• non-ascii-import-name (PLC2403)
• non-ascii-name (PLC2401)
• nonlocal-and-global (PLE0115)
• potential-index-error (PLE0643)
• redeclared-assigned-name (PLW0128)
• redefined-argument-from-local (PLR1704)
• repeated-keyword-argument (PLE1132)
• super-without-brackets (PLW0245)
• unnecessary-list-index-lookup (PLR1736)
• useless-exception-statement (PLW0133)
• useless-with-lock (PLW2101)

The following behaviors have been stabilized:

• is-literal (F632) now warns for identity checks against list, set or dictionary literals
• needless-bool (SIM103) now detects if expressions with implicit else branches
• module-import-not-at-top-of-file (E402) now allows os.environ modifications between import statements
• type-comparison (E721) now allows idioms such as type(x) is int
• yoda-condition (SIM300) now flags a wider range of expressions

Removals

The following deprecated settings have been removed:

• output-format=text; use output-format=concise or output-format=full
• tab-size; use indent-width

The following deprecated CLI options have been removed:

• --show-source; use --output-format=full
• --no-show-source; use --output-format=concise

The following deprecated CLI commands have been removed:

• ruff <path>; use ruff check <path>
• ruff --clean; use ruff clean
• ruff --generate-shell-completion; use ruff generate-shell-completion

Preview features

• [ruff] Add assert-with-print-message rule (#​11981)

CLI

• Use rule name rather than message in --statistics (#​11697)
• Use the output format full by default (#​12010)
• Don't log syntax errors to the console (#​11902)

Rule changes

• [ruff] Fix false positives if gettext is imported using an alias (RUF027) (#​12025)
• [npy] Update trapz and in1d deprecation (NPY201) (#​11948)
• [flake8-bandit] Modify diagnostic ranges for shell-related rules (#​10667)

Server

• Closing an untitled, unsaved notebook document no longer throws an error (#​11942)
• Support the usage of tildes and environment variables in logFile (#​11945)
• Add option to configure whether to show syntax errors (#​12059)

Bug fixes

• [pycodestyle] Avoid E203 for f-string debug expression (#​12024)
• [pep8-naming] Match import-name ignores against both name and alias (N812, N817) (#​12033)
• [pyflakes] Detect assignments that shadow definitions (F811) (#​11961)

Parser

• Emit a syntax error for an empty type parameter list (#​12030)
• Avoid consuming the newline for unterminated strings (#​12067)
• Do not include the newline in the unterminated string range (#​12017)
• Use the correct range to highlight line continuation errors (#​12016)
• Consider 2-character EOL before line continuations (#​12035)
• Consider line continuation character for re-lexing (#​12008)

Other changes

• Upgrade the Unicode table used for measuring the line-length (#​11194)
• Remove the deprecation error message for the nursery selector (#​10172)

v0.4.10

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Parser

• Implement re-lexing logic for better error recovery (#​11845)

Rule changes

• [flake8-copyright] Update CPY001 to check the first 4096 bytes instead of 1024 (#​11927)
• [pycodestyle] Update E999 to show all syntax errors instead of just the first one (#​11900)

Server

• Add tracing setup guide to Helix documentation (#​11883)
• Add tracing setup guide to Neovim documentation (#​11884)
• Defer notebook cell deletion to avoid an error message (#​11864)

Security

• Guard against malicious ecosystem comment artifacts (#​11879)

v0.4.9

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Preview features

• [pylint] Implement consider-dict-items (C0206) (#​11688)
• [refurb] Implement repeated-global (FURB154) (#​11187)

Rule changes

• [pycodestyle] Adapt fix for E203 to work identical to ruff format (#​10999)

Formatter

• Fix formatter instability for lines only consisting of zero-width characters (#​11748)

Server

• Add supported commands in server capabilities (#​11850)
• Use real file path when available in ruff server (#​11800)
• Improve error message when a command is run on an unavailable document (#​11823)
• Introduce the ruff.printDebugInformation command (#​11831)
• Tracing system now respects log level and trace level, with options to log to a file (#​11747)

CLI

• Handle non-printable characters in diff view (#​11687)

Bug fixes

• [refurb] Avoid suggesting starmap when arguments are used outside call (FURB140) (#​11830)
• [flake8-bugbear] Avoid panic in B909 when checking large loop blocks (#​11772)
• [refurb] Fix misbehavior of operator.itemgetter when getter param is a tuple (FURB118) (#​11774)

v0.4.8

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Performance

• Linter performance has been improved by around 10% on some microbenchmarks by refactoring the lexer and parser to maintain synchronicity between them (#​11457)

Preview features

• [flake8-bugbear] Implement return-in-generator (B901) (#​11644)
• [flake8-pyi] Implement PYI063 (#​11699)
• [pygrep_hooks] Check blanket ignores via file-level pragmas (PGH004) (#​11540)

Rule changes

• [pyupgrade] Update UP035 for Python 3.13 and the latest version of typing_extensions (#​11693)
• [numpy] Update NPY001 rule for NumPy 2.0 (#​11735)

Server

• Formatting a document with syntax problems no longer spams a visible error popup (#​11745)

CLI

• Add RDJson support for --output-format flag (#​11682)

Bug fixes

• [pyupgrade] Write empty string in lieu of panic when fixing UP032 (#​11696)
• [flake8-simplify] Simplify double negatives in SIM103 (#​11684)
• Ensure the expression generator adds a newline before type statements (#​11720)
• Respect per-file ignores for blanket and redirected noqa rules (#​11728)

v0.4.7

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Preview features

• [flake8-pyi] Implement PYI064 (#​11325)
• [flake8-pyi] Implement PYI066 (#​11541)
• [flake8-pyi] Implement PYI057 (#​11486)
• [pyflakes] Enable F822 in __init__.py files by default (#​11370)

Formatter

• Fix incorrect placement of trailing stub function comments (#​11632)

Server

• Respect file exclusions in ruff server (#​11590)
• Add support for documents not exist on disk (#​11588)
• Add Vim and Kate setup guide for ruff server (#​11615)

Bug fixes

• Avoid removing newlines between docstring headers and rST blocks (#​11609)
• Infer indentation with imports when logical indent is absent (#​11608)
• Use char index rather than position for indent slice (#​11645)
• [flake8-comprehension] Strip parentheses around generators in C400 (#​11607)
• Mark repeated-isinstance-calls as unsafe on Python 3.10 and later (#​11622)

v0.4.6

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Breaking changes

• Use project-relative paths when calculating GitLab fingerprints (#​11532)

Preview features

• [flake8-async] Sleep with >24 hour interval should usually sleep forever (ASYNC116) (#​11498)

Rule changes

• [numpy] Add missing functions to NumPy 2.0 migration rule (#​11528)
• [mccabe] Consider irrefutable pattern similar to if .. else for C901 (#​11565)
• Consider match-case statements for C901, PLR0912, and PLR0915 (#​11521)
• Remove empty strings when converting to f-string (UP032) (#​11524)
• [flake8-bandit] request-without-timeout should warn for requests.request (#​11548)
• [flake8-self] Ignore sunder accesses in flake8-self rules (#​11546)
• [pyupgrade] Lint for TypeAliasType usages (UP040) (#​11530)

Server

• Respect excludes in ruff server configuration discovery (#​11551)
• Use default settings if initialization options is empty or not provided (#​11566)
• ruff server correctly treats .pyi files as stub files (#​11535)
• ruff server searches for configuration in parent directories (#​11537)
• ruff server: An empty code action filter no longer returns notebook source actions (#​11526)

Bug fixes

• [flake8-logging-format] Fix autofix title in logging-warn (G010) (#​11514)
• [refurb] Avoid recommending operator.itemgetter with dependence on lambda arguments (#​11574)
• [flake8-simplify] Avoid recommending context manager in __enter__ implementations (#​11575)
• Create intermediary directories for --output-file (#​11550)
• Propagate reads on global variables (#​11584)
• Treat all singledispatch arguments as runtime-required (#​11523)

v0.4.5

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Ruff's language server is now in Beta

v0.4.5 marks the official Beta release of ruff server, an integrated language server built into Ruff.
ruff server supports the same feature set as ruff-lsp, powering linting, formatting, and
code fixes in Ruff's editor integrations -- but with superior performance and
no installation required. We'd love your feedback!

You can enable ruff server in the VS Code extension today.

To read more about this exciting milestone, check out our blog post!

Rule changes

• [flake8-future-annotations] Reword future-rewritable-type-annotation (FA100) message (#​11381)
• [pycodestyle] Consider soft keywords for E27 rules (#​11446)
• [pyflakes] Recommend adding unused import bindings to __all__ (#​11314)
• [pyflakes] Update documentation and deprecate ignore_init_module_imports (#​11436)
• [pyupgrade] Mark quotes as unnecessary for non-evaluated annotations (#​11485)

Formatter

• Avoid multiline quotes warning with quote-style = preserve (#​11490)

Server

• Support Jupyter Notebook files (#​11206)
• Support noqa comment code actions (#​11276)
• Fix automatic configuration reloading (#​11492)
• Fix several issues with configuration in Neovim and Helix (#​11497)

CLI

• Add --output-format as a CLI option for ruff config (#​11438)

Bug fixes

• Avoid PLE0237 for property with setter (#​11377)
• Avoid TCH005 for if stmt with elif/else block (#​11376)
• Avoid flagging __future__ annotations as required for non-evaluated type annotations (#​11414)
• Check for ruff executable in 'bin' directory as installed by 'pip install --target'. (#​11450)
• Sort edits prior to deduplicating in quotation fix (#​11452)
• Treat escaped newline as valid sequence (#​11465)
• [flake8-pie] Preserve parentheses in unnecessary-dict-kwargs (#​11372)
• [pylint] Ignore __slots__ with dynamic values (#​11488)
• [pylint] Remove try body from branch counting (#​11487)
• [refurb] Respect operator precedence in FURB110 (#​11464)

Documentation

• Add --preview to the README (#​11395)
• Add Python 3.13 to list of allowed Python versions (#​11411)
• Simplify Neovim setup documentation (#​11489)
• Update CONTRIBUTING.md to reflect the new parser (#​11434)
• Update server documentation with new migration guide (#​11499)
• [pycodestyle] Clarify motivation for E713 and E714 (#​11483)
• [pyflakes] Update docs to describe WAI behavior (F541) (#​11362)
• [pylint] Clearly indicate what is counted as a branch (#​11423)

v0.4.4

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Preview features

• [pycodestyle] Ignore end-of-line comments when determining blank line rules (#​11342)
• [pylint] Detect pathlib.Path.open calls in unspecified-encoding (PLW1514) (#​11288)
• [flake8-pyi] Implement PYI059 (generic-not-last-base-class) (#​11233)
• [flake8-pyi] Implement PYI062 (duplicate-literal-member) (#​11269)

Rule changes

• [flake8-boolean-trap] Allow passing booleans as positional-only arguments in code such as set(True) (#​11287)
• [flake8-bugbear] Ignore enum classes in cached-instance-method (B019) (#​11312)

Server

• Expand tildes when resolving Ruff server configuration file (#​11283)
• Fix ruff server hanging after Neovim closes (#​11291)
• Editor settings are used by default if no file-based configuration exists (#​11266)

Bug fixes

• [pylint] Consider with statements for too-many-branches (PLR0912) (#​11321)
• [flake8-blind-except, tryceratops] Respect logged and re-raised expressions in nested statements (BLE001, TRY201) (#​11301)
• Recognise assignments such as __all__ = builtins.list(["foo", "bar"]) as valid __all__ definitions (#​11335)

v0.4.3

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Enhancements

• Add support for PEP 696 syntax (#​11120)

Preview features

• [refurb] Use function range for reimplemented-operator diagnostics (#​11271)
• [refurb] Ignore methods in reimplemented-operator (FURB118) (#​11270)
• [refurb] Implement fstring-number-format (FURB116) (#​10921)
• [ruff] Implement redirected-noqa (RUF101) (#​11052)
• [pyflakes] Distinguish between first-party and third-party imports for fix suggestions (#​11168)

Rule changes

• [flake8-bugbear] Ignore non-abstract class attributes when enforcing B024 (#​11210)
• [flake8-logging] Include inline instantiations when detecting loggers (#​11154)
• [pylint] Also emit PLR0206 for properties with variadic parameters (#​11200)
• [ruff] Detect duplicate codes as part of unused-noqa (RUF100) (#​10850)

Formatter

• Avoid multiline expression if format specifier is present (#​11123)

LSP

• Write ruff server setup guide for Helix (#​11183)
• ruff server no longer hangs after shutdown (#​11222)
• ruff server reads from a configuration TOML file in the user configuration directory if no local configuration exists (#​11225)
• ruff server respects per-file-ignores configuration (#​11224)
• ruff server: Support a custom TOML configuration file (#​11140)
• ruff server: Support setting to prioritize project configuration over editor configuration (#​11086)

Bug fixes

• Avoid debug assertion around NFKC renames (#​11249)
• [pyflakes] Prioritize redefined-while-unused over unused-import (#​11173)
• [ruff] Respect async expressions in comprehension bodies (#​11219)
• [pygrep_hooks] Fix blanket-noqa panic when last line has noqa with no newline (PGH004) (#​11108)
• [perflint] Ignore list-copy recommendations for async for loops (#​11250)
• [pyflakes] Improve invalid-print-syntax documentation (#​11171)

Performance

• Avoid allocations for isort module names (#​11251)
• Build a separate ARM wheel for macOS (#​11149)

v0.4.2

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Rule changes

• [flake8-pyi] Allow for overloaded __exit__ and __aexit__ definitions (PYI036) (#​11057)
• [pyupgrade] Catch usages of "%s" % var and provide an unsafe fix (UP031) (#​11019)
• [refurb] Implement new rule that suggests min/max over sorted() (FURB192) (#​10868)

Server

• Fix an issue with missing diagnostics for Neovim and Helix (#​11092)
• Implement hover documentation for noqa codes (#​11096)
• Introduce common Ruff configuration options with new server settings (#​11062)

Bug fixes

• Use macos-12 for building release wheels to enable macOS 11 compatibility (#​11146)
• [flake8-blind-expect] Allow raise from in BLE001 (#​11131)
• [flake8-pyi] Allow simple assignments to None in enum class scopes (PYI026) (#​11128)
• [flake8-simplify] Avoid raising SIM911 for non-zip attribute calls (#​11126)
• [refurb] Avoid operator.itemgetter suggestion for single-item tuple (#​11095)
• [ruff] Respect per-file-ignores for RUF100 with no other diagnostics (#​11058)
• [ruff] Fix async comprehension false positive (RUF029) (#​11070)

Documentation

• [flake8-bugbear] Document explicitly disabling strict zip (B905) (#​11040)
• [flake8-type-checking] Mention lint.typing-modules in TCH001, TCH002, and TCH003 (#​11144)
• [isort] Improve documentation around custom isort sections (#​11050)
• [pylint] Fix documentation oversight for invalid-X-returns (#​11094)

Performance

• Use matchit to resolve per-file settings (#​11111)

v0.4.1

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Preview features

• [pylint] Implement invalid-hash-returned (PLE0309) (#​10961)
• [pylint] Implement invalid-index-returned (PLE0305) (#​10962)

Bug fixes

• [pylint] Allow NoReturn-like functions for __str__, __len__, etc. (PLE0307) (#​11017)
• Parser: Use empty range when there's "gap" in token source (#​11032)
• [ruff] Ignore stub functions in unused-async (RUF029) (#​11026)
• Parser: Expect indented case block instead of match stmt (#​11033)

v0.4.0

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A new, hand-written parser

Ruff's new parser is >2x faster, which translates to a 20-40% speedup for all linting and formatting invocations.
There's a lot to say about this exciting change, so check out the blog post for more details!

See #​10036 for implementation details.

A new language server in Rust

With this release, we also want to highlight our new language server. ruff server is a Rust-powered language
server that comes built-in with Ruff. It can be used with any editor that supports the Language Server Protocol (LSP).
It uses a multi-threaded, lock-free architecture inspired by rust-analyzer and it will open the door for a lot
of exciting features. It’s also faster than our previous Python-based language server
-- but you probably guessed that already.

ruff server is only in alpha, but it has a lot of features that you can try out today:

• Lints Python files automatically and shows quick-fixes when available
• Formats Python files, with support for range formatting
• Comes with commands for quickly performing actions: ruff.applyAutofix, ruff.applyFormat, and ruff.applyOrganizeImports
• Supports source.fixAll and source.organizeImports source actions
• Automatically reloads your project configuration when you change it

To setup ruff server with your editor, refer to the README.md.

Preview features

• [pycodestyle] Do not trigger E3 rules on defs following a function/method with a dummy body (#​10704)
• [pylint] Implement invalid-bytes-returned (E0308) (#​10959)
• [pylint] Implement invalid-length-returned (E0303) (#​10963)
• [pylint] Implement self-cls-assignment (W0642) (#​9267)
• [pylint] Omit stubs from invalid-bool and invalid-str-return-type (#​11008)
• [ruff] New rule unused-async (RUF029) to detect unneeded async keywords on functions (#​9966)

Rule changes

• [flake8-bandit] Allow urllib.request.urlopen calls with static Request argument (S310) (#​10964)
• [flake8-bugbear] Treat raise NotImplemented-only bodies as stub functions (B006) (#​10990)
• [flake8-slots] Respect same-file Enum subclasses (SLOT000) (#​11006)
• [pylint] Support inverted comparisons (PLR1730) (#​10920)

Linter

• Improve handling of builtin symbols in linter rules (#​10919)
• Improve display of rules in --show-settings (#​11003)
• Improve inference capabilities of the BuiltinTypeChecker (#​10976)
• Resolve classes and functions relative to script name (#​10965)
• Improve performance of RuleTable::any_enabled (#​10971)

Server

This section is devoted to updates for our new language server, written in Rust.

• Enable ruff-specific source actions (#​10916)
• Refreshes diagnostics for open files when file configuration is changed (#​10988)
• Important errors are now shown as popups (#​10951)
• Introduce settings for directly configuring the linter and formatter (#​10984)
• Resolve configuration for each document individually (#​10950)
• Write a setup guide for Neovim (#​10987)

Configuration

• Add RUFF_OUTPUT_FILE environment variable support (#​10992)

Bug fixes

• Avoid non-augmented-assignment for reversed, non-commutative operators (PLR6104) (#​10909)
• Limit commutative non-augmented-assignments to primitive data types (PLR6104) (#​10912)
• Respect per-file-ignores for RUF100 on blanket # noqa (#​10908)
• Consider if expression for parenthesized with items parsing (#​11010)
• Consider binary expr for parenthesized with items parsing (#​11012)
• Reset FOR_TARGET context for all kinds of parentheses (#​11009)

v0.3.7

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Preview features

• [flake8-bugbear] Implement loop-iterator-mutation (B909) (#​9578)
• [pylint] Implement rule to prefer augmented assignment (PLR6104) (#​9932)

Bug fixes

• Avoid TOCTOU errors in cache initialization (#​10884)
• [pylint] Recode nan-comparison rule to W0177 (#​10894)
• [pylint] Reverse min-max logic in if-stmt-min-max (#​10890)

v0.3.6

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Preview features

• [pylint] Implement bad-staticmethod-argument (PLW0211) (#​10781)
• [pylint] Implement if-stmt-min-max (PLR1730, PLR1731) (#​10002)
• [pyupgrade] Replace str,Enum multiple inheritance with StrEnum UP042 (#​10713)
• [refurb] Implement if-expr-instead-of-or-operator (FURB110) (#​10687)
• [refurb] Implement int-on-sliced-str (FURB166) (#​10650)
• [refurb] Implement write-whole-file (FURB103) (#​10802)
• [refurb] Support itemgetter in reimplemented-operator (FURB118) (#​10526)
• [flake8_comprehensions] Add sum/min/max to unnecessary comprehension check (C419) (#​10759)

Rule changes

• [pydocstyle] Require capitalizing docstrings where the first sentence is a single word (D403) (#​10776)
• [pycodestyle] Ignore annotated lambdas in class scopes (E731) (#​10720)
• [flake8-pyi] Various improvements to PYI034 (#​10807)
• [flake8-slots] Flag subclasses of call-based typing.NamedTuples as well as subclasses of collections.namedtuple() (SLOT002) (#​10808)
• [

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