Update dependency ruff to v0.6.8

[renovate]

This PR updates ruff, the tooling that calls ruff, and code failing under ruff's checks.

---

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
ruff (source, changelog)	0.4.4 -> 0.6.8

---

Release Notes

astral-sh/ruff (ruff)

v0.6.8

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Preview features

• Remove unnecessary parentheses around match case clauses (#​13510)
• Parenthesize overlong if guards in match..case clauses (#​13513)
• Detect basic wildcard imports in ruff analyze graph (#​13486)
• [pylint] Implement boolean-chained-comparison (R1716) (#​13435)

Rule changes

• [lake8-simplify] Detect SIM910 when using variadic keyword arguments, i.e., **kwargs (#​13503)
• [pyupgrade] Avoid false negatives with non-reference shadowed bindings of loop variables (UP028) (#​13504)

Bug fixes

• Detect tuples bound to variadic positional arguments i.e. *args (#​13512)
• Exit gracefully on broken pipe errors (#​13485)
• Avoid panic when analyze graph hits broken pipe (#​13484)

Performance

• Reuse BTreeSets in module resolver (#​13440)
• Skip traversal for non-compound statements (#​13441)

v0.6.7

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Preview features

• Add Python version support to ruff analyze CLI (#​13426)
• Add exclude support to ruff analyze (#​13425)
• Fix parentheses around return type annotations (#​13381)

Rule changes

• [pycodestyle] Fix: Don't autofix if the first line ends in a question mark? (D400) (#​13399)

Bug fixes

• Respect lint.exclude in ruff check --add-noqa (#​13427)

Performance

• Avoid tracking module resolver files in Salsa (#​13437)
• Use forget for module resolver database (#​13438)

v0.6.6

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Preview features

• [refurb] Skip slice-to-remove-prefix-or-suffix (FURB188) when non-trivial slice steps are present (#​13405)
• Add a subcommand to generate dependency graphs (#​13402)

Formatter

• Fix placement of inline parameter comments (#​13379)

Server

• Fix off-by one error in the LineIndex::offset calculation (#​13407)

Bug fixes

• [fastapi] Respect FastAPI aliases in route definitions (#​13394)
• [pydocstyle] Respect word boundaries when detecting function signature in docs (#​13388)

Documentation

• Add backlinks to rule overview linter (#​13368)
• Fix documentation for editor vim plugin ALE (#​13348)
• Fix rendering of FURB188 docs (#​13406)

v0.6.5

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Preview features

• [pydoclint] Ignore DOC201 when function name is "new" (#​13300)
• [refurb] Implement slice-to-remove-prefix-or-suffix (FURB188) (#​13256)

Rule changes

• [eradicate] Ignore script-comments with multiple end-tags (ERA001) (#​13283)
• [pyflakes] Improve error message for UndefinedName when a builtin was added in a newer version than specified in Ruff config (F821) (#​13293)

Server

• Add support for extensionless Python files for server (#​13326)
• Fix configuration inheritance for configurations specified in the LSP settings (#​13285)

Bug fixes

• [ruff] Handle unary operators in decimal-from-float-literal (RUF032) (#​13275)

CLI

• Only include rules with diagnostics in SARIF metadata (#​13268)

Playground

• Add "Copy as pyproject.toml/ruff.toml" and "Paste from TOML" (#​13328)
• Fix errors not shown for restored snippet on page load (#​13262)

v0.6.4

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Preview features

• [flake8-builtins] Use dynamic builtins list based on Python version (#​13172)
• [pydoclint] Permit yielding None in DOC402 and DOC403 (#​13148)
• [pylint] Update diagnostic message for PLW3201 (#​13194)
• [ruff] Implement post-init-default (RUF033) (#​13192)
• [ruff] Implement useless if-else (RUF034) (#​13218)

Rule changes

• [flake8-pyi] Respect pep8_naming.classmethod-decorators settings when determining if a method is a classmethod in custom-type-var-return-type (PYI019) (#​13162)
• [flake8-pyi] Teach various rules that annotations might be stringized (#​12951)
• [pylint] Avoid no-self-use for attrs-style validators (#​13166)
• [pylint] Recurse into subscript subexpressions when searching for list/dict lookups (PLR1733, PLR1736) (#​13186)
• [pyupgrade] Detect aiofiles.open calls in UP015 (#​13173)
• [pyupgrade] Mark sys.version_info[0] < 3 and similar comparisons as outdated (UP036) (#​13175)

CLI

• Enrich messages of SARIF results (#​13180)
• Handle singular case for incompatible rules warning in ruff format output (#​13212)

Bug fixes

• [pydocstyle] Improve heuristics for detecting Google-style docstrings (#​13142)
• [refurb] Treat sep arguments with effects as unsafe removals (FURB105) (#​13165)

v0.6.3

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Preview features

• [flake8-simplify] Extend open-file-with-context-handler to work with dbm.sqlite3 (SIM115) (#​13104)
• [pycodestyle] Disable E741 in stub files (.pyi) (#​13119)
• [pydoclint] Avoid DOC201 on explicit returns in functions that only return None (#​13064)

Rule changes

• [flake8-async] Disable check for asyncio before Python 3.11 (ASYNC109) (#​13023)

Bug fixes

• [FastAPI] Avoid introducing invalid syntax in fix for fast-api-non-annotated-dependency (FAST002) (#​13133)
• [flake8-implicit-str-concat] Normalize octals before merging concatenated strings in single-line-implicit-string-concatenation (ISC001) (#​13118)
• [flake8-pytest-style] Improve help message for pytest-incorrect-mark-parentheses-style (PT023) (#​13092)
• [pylint] Avoid autofix for calls that aren't min or max as starred expression (PLW3301) (#​13089)
• [ruff] Add datetime.time, datetime.tzinfo, and datetime.timezone as immutable function calls (RUF009) (#​13109)
• [ruff] Extend comment deletion for RUF100 to include trailing text from noqa directives while preserving any following comments on the same line, if any (#​13105)
• Fix dark theme on initial page load for the Ruff playground (#​13077)

v0.6.2

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Preview features

• [flake8-simplify] Extend open-file-with-context-handler to work with other standard-library IO modules (SIM115) (#​12959)
• [ruff] Avoid unused-async for functions with FastAPI route decorator (RUF029) (#​12938)
• [ruff] Ignore fstring-missing-syntax (RUF027) for fastAPI paths (#​12939)
• [ruff] Implement check for Decimal called with a float literal (RUF032) (#​12909)

Rule changes

• [flake8-bugbear] Update diagnostic message when expression is at the end of function (B015) (#​12944)
• [flake8-pyi] Skip type annotations in string-or-bytes-too-long (PYI053) (#​13002)
• [flake8-type-checking] Always recognise relative imports as first-party (#​12994)
• [flake8-unused-arguments] Ignore unused arguments on stub functions (ARG001) (#​12966)
• [pylint] Ignore augmented assignment for self-cls-assignment (PLW0642) (#​12957)

Server

• Show full context in error log messages (#​13029)

Bug fixes

• [pep8-naming] Don't flag from imports following conventional import names (N817) (#​12946)
• [pylint] - Allow __new__ methods to have cls as their first argument even if decorated with @staticmethod for bad-staticmethod-argument (PLW0211) (#​12958)

Documentation

• Add hyperfine installation instructions; update hyperfine code samples (#​13034)
• Expand note to use Ruff with other language server in Kate (#​12806)
• Update example for PT001 as per the new default behavior (#​13019)
• [perflint] Improve docs for try-except-in-loop (PERF203) (#​12947)
• [pydocstyle] Add reference to lint.pydocstyle.ignore-decorators setting to rule docs (#​12996)

v0.6.1

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This is a hotfix release to address an issue with ruff-pre-commit. In v0.6,
Ruff changed its behavior to lint and format Jupyter notebooks by default;
however, due to an oversight, these files were still excluded by default if
Ruff was run via pre-commit, leading to inconsistent behavior.
This has now been fixed.

Preview features

• [fastapi] Implement fast-api-unused-path-parameter (FAST003) (#​12638)

Rule changes

• [pylint] Rename too-many-positional to too-many-positional-arguments (R0917) (#​12905)

Server

• Fix crash when applying "fix-all" code-action to notebook cells (#​12929)

Other changes

• [flake8-naming]: Respect import conventions (N817) (#​12922)

v0.6.0

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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.

• Lint and format Jupyter Notebook by default (#​12878).
• Detect imports in src layouts by default for isort rules (#​12848)
• The pytest rules PT001 and PT023 now default to omitting the decorator parentheses when there are no arguments (#​12838).

Deprecations

The following rules are now deprecated:

• pytest-missing-fixture-name-underscore (PT004)
• pytest-incorrect-fixture-name-underscore (PT005)
• unpacked-list-comprehension (UP027)

Remapped rules

The following rules have been remapped to new rule codes:

• unnecessary-dict-comprehension-for-iterable: RUF025 to C420

Stabilization

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

• singledispatch-method (PLE1519)
• singledispatchmethod-function (PLE1520)
• bad-staticmethod-argument (PLW0211)
• if-stmt-min-max (PLR1730)
• invalid-bytes-return-type (PLE0308)
• invalid-hash-return-type (PLE0309)
• invalid-index-return-type (PLE0305)
• invalid-length-return-type (E303)
• self-or-cls-assignment (PLW0642)
• byte-string-usage (PYI057)
• duplicate-literal-member (PYI062)
• redirected-noqa (RUF101)

The following behaviors have been stabilized:

• cancel-scope-no-checkpoint (ASYNC100): Support asyncio and anyio context mangers.
• async-function-with-timeout (ASYNC109): Support asyncio and anyio context mangers.
• async-busy-wait (ASYNC110): Support asyncio and anyio context mangers.
• async-zero-sleep (ASYNC115): Support anyio context mangers.
• long-sleep-not-forever (ASYNC116): Support anyio context mangers.

The following fixes have been stabilized:

• superfluous-else-return (RET505)
• superfluous-else-raise (RET506)
• superfluous-else-continue (RET507)
• superfluous-else-break (RET508)

Preview features

• [flake8-simplify] Further simplify to binary in preview for (SIM108) (#​12796)
• [pyupgrade] Show violations without auto-fix (UP031) (#​11229)

Rule changes

• [flake8-import-conventions] Add xml.etree.ElementTree to default conventions (#​12455)
• [flake8-pytest-style] Add a space after comma in CSV output (PT006) (#​12853)

Server

• Show a message for incorrect settings (#​12781)

Bug fixes

• [flake8-async] Do not lint yield in context manager (ASYNC100) (#​12896)
• [flake8-comprehensions] Do not lint async for comprehensions (C419) (#​12895)
• [flake8-return] Only add return None at end of a function (RET503) (#​11074)
• [flake8-type-checking] Avoid treating dataclasses.KW_ONLY as typing-only (TCH003) (#​12863)
• [pep8-naming] Treat type(Protocol) et al as metaclass base (N805) (#​12770)
• [pydoclint] Don't enforce returns and yields in abstract methods (DOC201, DOC202) (#​12771)
• [ruff] Skip tuples with slice expressions in (RUF031) (#​12768)
• [ruff] Ignore unparenthesized tuples in subscripts when the subscript is a type annotation or type alias (RUF031) (#​12762)
• [ruff] Ignore template strings passed to logging and builtins._() calls (RUF027) (#​12889)
• [ruff] Do not remove parens for tuples with starred expressions in Python <=3.10 (RUF031) (#​12784)
• Evaluate default parameter values for a function in that function's enclosing scope (#​12852)

Other changes

• Respect VS Code cell metadata when detecting the language of Jupyter Notebook cells (#​12864)
• Respect kernelspec notebook metadata when detecting the preferred language for a Jupyter Notebook (#​12875)

v0.5.7

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Preview features

• [flake8-comprehensions] Account for list and set comprehensions in unnecessary-literal-within-tuple-call (C409) (#​12657)
• [flake8-pyi] Add autofix for future-annotations-in-stub (PYI044) (#​12676)
• [flake8-return] Avoid syntax error when auto-fixing RET505 with mixed indentation (space and tabs) (#​12740)
• [pydoclint] Add docstring-missing-yields (DOC402) and docstring-extraneous-yields (DOC403) (#​12538)
• [pydoclint] Avoid DOC201 if docstring begins with "Return", "Returns", "Yield", or "Yields" (#​12675)
• [pydoclint] Deduplicate collected exceptions after traversing function bodies (DOC501) (#​12642)
• [pydoclint] Ignore DOC errors for stub functions (#​12651)
• [pydoclint] Teach rules to understand reraised exceptions as being explicitly raised (DOC501, DOC502) (#​12639)
• [ruff] Implement incorrectly-parenthesized-tuple-in-subscript (RUF031) (#​12480)
• [ruff] Mark RUF023 fix as unsafe if __slots__ is not a set and the binding is used elsewhere (#​12692)

Rule changes

• [refurb] Add autofix for implicit-cwd (FURB177) (#​12708)
• [ruff] Add autofix for zip-instead-of-pairwise (RUF007) (#​12663)
• [tryceratops] Add BaseException to raise-vanilla-class rule (TRY002) (#​12620)

Server

• Ignore non-file workspace URL; Ruff will display a warning notification in this case (#​12725)

CLI

• Fix cache invalidation for nested pyproject.toml files (#​12727)

Bug fixes

• [flake8-async] Fix false positives with multiple async with items (ASYNC100) (#​12643)
• [flake8-bandit] Avoid false-positives for list concatenations in SQL construction (S608) (#​12720)
• [flake8-bugbear] Treat return as equivalent to break (B909) (#​12646)
• [flake8-comprehensions] Set comprehensions not a violation for sum in unnecessary-comprehension-in-call (C419) (#​12691)
• [flake8-simplify] Parenthesize conditions based on precedence when merging if arms (SIM114) (#​12737)
• [pydoclint] Try both 'Raises' section styles when convention is unspecified (DOC501) (#​12649)

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

Compare Source

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

Compare Source

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](https://redirect.github.com/astral-sh/ruff

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[micahellison]

This is only failing on the docs accessibility check, which is an unrelated issue.