chore(deps): update dependency ruff to v0.9.5

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
ruff (source, changelog)	0.1.14 -> 0.9.5

---

Release Notes

astral-sh/ruff (ruff)

v0.9.5

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Preview features

• Recognize all symbols named TYPE_CHECKING for in_type_checking_block (#​15719)
• [flake8-comprehensions] Handle builtins at top of file correctly for unnecessary-dict-comprehension-for-iterable (C420) (#​15837)
• [flake8-logging] .exception() and exc_info= outside exception handlers (LOG004, LOG014) (#​15799)
• [flake8-pyi] Fix incorrect behaviour of custom-typevar-return-type preview-mode autofix if typing was already imported (PYI019) (#​15853)
• [flake8-pyi] Fix more complex cases (PYI019) (#​15821)
• [flake8-pyi] Make PYI019 autofixable for .py files in preview mode as well as stubs (#​15889)
• [flake8-pyi] Remove type parameter correctly when it is the last (PYI019) (#​15854)
• [pylint] Fix missing parens in unsafe fix for unnecessary-dunder-call (PLC2801) (#​15762)
• [pyupgrade] Better messages and diagnostic range (UP015) (#​15872)
• [pyupgrade] Rename private type parameters in PEP 695 generics (UP049) (#​15862)
• [refurb] Also report non-name expressions (FURB169) (#​15905)
• [refurb] Mark fix as unsafe if there are comments (FURB171) (#​15832)
• [ruff] Classes with mixed type variable style (RUF053) (#​15841)
• [airflow] BashOperator has been moved to airflow.providers.standard.operators.bash.BashOperator (AIR302) (#​15922)
• [flake8-pyi] Add autofix for unused-private-type-var (PYI018) (#​15999)
• [flake8-pyi] Significantly improve accuracy of PYI019 if preview mode is enabled (#​15888)

Rule changes

• Preserve triple quotes and prefixes for strings (#​15818)
• [flake8-comprehensions] Skip when TypeError present from too many (kw)args for C410,C411, and C418 (#​15838)
• [flake8-pyi] Rename PYI019 and improve its diagnostic message (#​15885)
• [pep8-naming] Ignore @override methods (N803) (#​15954)
• [pyupgrade] Reuse replacement logic from UP046 and UP047 to preserve more comments (UP040) (#​15840)
• [ruff] Analyze deferred annotations before enforcing mutable-(data)class-default and function-call-in-dataclass-default-argument (RUF008,RUF009,RUF012) (#​15921)
• [pycodestyle] Exempt sys.path += ... calls (E402) (#​15980)

Configuration

• Config error only when flake8-import-conventions alias conflicts with isort.required-imports bound name (#​15918)
• Workaround Even Better TOML crash related to allOf (#​15992)

Bug fixes

• [flake8-comprehensions] Unnecessary list comprehension (rewrite as a set comprehension) (C403) - Handle extraneous parentheses around list comprehension (#​15877)
• [flake8-comprehensions] Handle trailing comma in fixes for unnecessary-generator-list/set (C400,C401) (#​15929)
• [flake8-pyi] Fix several correctness issues with custom-type-var-return-type (PYI019) (#​15851)
• [pep8-naming] Consider any number of leading underscore for N801 (#​15988)
• [pyflakes] Visit forward annotations in TypeAliasType as types (F401) (#​15829)
• [pylint] Correct min/max auto-fix and suggestion for (PL1730) (#​15930)
• [refurb] Handle unparenthesized tuples correctly (FURB122, FURB142) (#​15953)
• [refurb] Avoid None | None as well as better detection and fix (FURB168) (#​15779)

Documentation

• Add deprecation warning for ruff-lsp related settings (#​15850)
• Docs (linter.md): clarify that Python files are always searched for in subdirectories (#​15882)
• Fix a typo in non_pep695_generic_class.rs (#​15946)
• Improve Docs: Pylint subcategories' codes (#​15909)
• Remove non-existing lint.extendIgnore editor setting (#​15844)
• Update black deviations (#​15928)
• Mention UP049 in UP046 and UP047, add See also section to UP040 (#​15956)
• Add instance variable examples to RUF012 (#​15982)
• Explain precedence for ignore and select config (#​15883)

v0.9.4

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Preview features

• [airflow] Extend airflow context parameter check for BaseOperator.execute (AIR302) (#​15713)
• [airflow] Update AIR302 to check for deprecated context keys (#​15144)
• [flake8-bandit] Permit suspicious imports within stub files (S4) (#​15822)
• [pylint] Do not trigger PLR6201 on empty collections (#​15732)
• [refurb] Do not emit diagnostic when loop variables are used outside loop body (FURB122) (#​15757)
• [ruff] Add support for more re patterns (RUF055) (#​15764)
• [ruff] Check for shadowed map before suggesting fix (RUF058) (#​15790)
• [ruff] Do not emit diagnostic when all arguments to zip() are variadic (RUF058) (#​15744)
• [ruff] Parenthesize fix when argument spans multiple lines for unnecessary-round (RUF057) (#​15703)

Rule changes

• Preserve quote style in generated code (#​15726, #​15778, #​15794)
• [flake8-bugbear] Exempt NewType calls where the original type is immutable (B008) (#​15765)
• [pylint] Honor banned top-level imports by TID253 in PLC0415. (#​15628)
• [pyupgrade] Ignore is_typeddict and TypedDict for deprecated-import (UP035) (#​15800)

CLI

• Fix formatter warning message for flake8-quotes option (#​15788)
• Implement tab autocomplete for ruff config (#​15603)

Bug fixes

• [flake8-comprehensions] Do not emit unnecessary-map diagnostic when lambda has different arity (C417) (#​15802)
• [flake8-comprehensions] Parenthesize sorted when needed for unnecessary-call-around-sorted (C413) (#​15825)
• [pyupgrade] Handle end-of-line comments for quoted-annotation (UP037) (#​15824)

Documentation

• Add missing config docstrings (#​15803)
• Add references to trio.run_process and anyio.run_process (#​15761)
• Use uv init --lib in tutorial (#​15718)

v0.9.3

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Preview features

• [airflow] Argument fail_stop in DAG has been renamed as fail_fast (AIR302) (#​15633)
• [airflow] Extend AIR303 with more symbols (#​15611)
• [flake8-bandit] Report all references to suspicious functions (S3) (#​15541)
• [flake8-pytest-style] Do not emit diagnostics for empty for loops (PT012, PT031) (#​15542)
• [flake8-simplify] Avoid double negations (SIM103) (#​15562)
• [pyflakes] Fix infinite loop with unused local import in __init__.py (F401) (#​15517)
• [pylint] Do not report methods with only one EM101-compatible raise (PLR6301) (#​15507)
• [pylint] Implement redefined-slots-in-subclass (W0244) (#​9640)
• [pyupgrade] Add rules to use PEP 695 generics in classes and functions (UP046, UP047) (#​15565, #​15659)
• [refurb] Implement for-loop-writes (FURB122) (#​10630)
• [ruff] Implement needless-else clause (RUF047) (#​15051)
• [ruff] Implement starmap-zip (RUF058) (#​15483)

Rule changes

• [flake8-bugbear] Do not raise error if keyword argument is present and target-python version is less or equals than 3.9 (B903) (#​15549)
• [flake8-comprehensions] strip parentheses around generators in unnecessary-generator-set (C401) (#​15553)
• [flake8-pytest-style] Rewrite references to .exception (PT027) (#​15680)
• [flake8-simplify] Mark fixes as unsafe (SIM201, SIM202) (#​15626)
• [flake8-type-checking] Fix some safe fixes being labeled unsafe (TC006,TC008) (#​15638)
• [isort] Omit trailing whitespace in unsorted-imports (I001) (#​15518)
• [pydoclint] Allow ignoring one line docstrings for DOC rules (#​13302)
• [pyflakes] Apply redefinition fixes by source code order (F811) (#​15575)
• [pyflakes] Avoid removing too many imports in redefined-while-unused (F811) (#​15585)
• [pyflakes] Group redefinition fixes by source statement (F811) (#​15574)
• [pylint] Include name of base class in message for redefined-slots-in-subclass (W0244) (#​15559)
• [ruff] Update fix for RUF055 to use var == value (#​15605)

Formatter

• Fix bracket spacing for single-element tuples in f-string expressions (#​15537)
• Fix unstable f-string formatting for expressions containing a trailing comma (#​15545)

Performance

• Avoid quadratic membership check in import fixes (#​15576)

Server

• Allow unsafe-fixes settings for code actions (#​15666)

Bug fixes

• [flake8-bandit] Add missing single-line/dotall regex flag (S608) (#​15654)
• [flake8-import-conventions] Fix infinite loop between ICN001 and I002 (ICN001) (#​15480)
• [flake8-simplify] Do not emit diagnostics for expressions inside string type annotations (SIM222, SIM223) (#​15405)
• [pyflakes] Treat arguments passed to the default= parameter of TypeVar as type expressions (F821) (#​15679)
• [pyupgrade] Avoid syntax error when the iterable is a non-parenthesized tuple (UP028) (#​15543)
• [ruff] Exempt NewType calls where the original type is immutable (RUF009) (#​15588)
• Preserve raw string prefix and escapes in all codegen fixes (#​15694)

Documentation

• Generate documentation redirects for lowercase rule codes (#​15564)
• TRY300: Add some extra notes on not catching exceptions you didn't expect (#​15036)

v0.9.2

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Preview features

• [airflow] Fix typo "security_managr" to "security_manager" (AIR303) (#​15463)
• [airflow] extend and fix AIR302 rules (#​15525)
• [fastapi] Handle parameters with Depends correctly (FAST003) (#​15364)
• [flake8-pytest-style] Implement pytest.warns diagnostics (PT029, PT030, PT031) (#​15444)
• [flake8-pytest-style] Test function parameters with default arguments (PT028) (#​15449)
• [flake8-type-checking] Avoid false positives for | in TC008 (#​15201)

Rule changes

• [flake8-todos] Allow VSCode GitHub PR extension style links in missing-todo-link (TD003) (#​15519)
• [pyflakes] Show syntax error message for F722 (#​15523)

Formatter

• Fix curly bracket spacing around f-string expressions containing curly braces (#​15471)
• Fix joining of f-strings with different quotes when using quote style Preserve (#​15524)

Server

• Avoid indexing the same workspace multiple times (#​15495)
• Display context for ruff.configuration errors (#​15452)

Configuration

• Remove flatten to improve deserialization error messages (#​15414)

Bug fixes

• Parse triple-quoted string annotations as if parenthesized (#​15387)
• [fastapi] Update Annotated fixes (FAST002) (#​15462)
• [flake8-bandit] Check for builtins instead of builtin (S102, PTH123) (#​15443)
• [flake8-pathlib] Fix --select for os-path-dirname (PTH120) (#​15446)
• [ruff] Fix false positive on global keyword (RUF052) (#​15235)

v0.9.1

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Preview features

• [pycodestyle] Run too-many-newlines-at-end-of-file on each cell in notebooks (W391) (#​15308)
• [ruff] Omit diagnostic for shadowed private function parameters in used-dummy-variable (RUF052) (#​15376)

Rule changes

• [flake8-bugbear] Improve assert-raises-exception message (B017) (#​15389)

Formatter

• Preserve trailing end-of line comments for the last string literal in implicitly concatenated strings (#​15378)

Server

• Fix a bug where the server and client notebooks were out of sync after reordering cells (#​15398)

Bug fixes

• [flake8-pie] Correctly remove wrapping parentheses (PIE800) (#​15394)
• [pyupgrade] Handle comments and multiline expressions correctly (UP037) (#​15337)

v0.9.0

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

Breaking changes

Ruff now formats your code according to the 2025 style guide. As a result, your code might now get formatted differently. See the formatter section for a detailed list of changes.

This release doesn’t remove or remap any existing stable rules.

Stabilization

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

• stdlib-module-shadowing (A005).
  This rule has also been renamed: previously, it was called builtin-module-shadowing.
• builtin-lambda-argument-shadowing (A006)
• slice-to-remove-prefix-or-suffix (FURB188)
• boolean-chained-comparison (PLR1716)
• decimal-from-float-literal (RUF032)
• post-init-default (RUF033)
• useless-if-else (RUF034)

The following behaviors have been stabilized:

• pytest-parametrize-names-wrong-type (PT006): Detect pytest.parametrize calls outside decorators and calls with keyword arguments.
• module-import-not-at-top-of-file (E402): Ignore pytest.importorskip calls between import statements.
• mutable-dataclass-default (RUF008) and function-call-in-dataclass-default-argument (RUF009): Add support for attrs.
• bad-version-info-comparison (PYI006): Extend the rule to check non-stub files.

The following fixes or improvements to fixes have been stabilized:

• redundant-numeric-union (PYI041)
• duplicate-union-members (PYI016)

Formatter

This release introduces the new 2025 stable style (#​13371), stabilizing the following changes:

• Format expressions in f-string elements (#​7594)
• Alternate quotes for strings inside f-strings (#​13860)
• Preserve the casing of hex codes in f-string debug expressions (#​14766)
• Choose the quote style for each string literal in an implicitly concatenated f-string rather than for the entire string (#​13539)
• Automatically join an implicitly concatenated string into a single string literal if it fits on a single line (#​9457)
• Remove the ISC001 incompatibility warning (#​15123)
• Prefer parenthesizing the assert message over breaking the assertion expression (#​9457)
• Automatically parenthesize over-long if guards in match case clauses (#​13513)
• More consistent formatting for match case patterns (#​6933)
• Avoid unnecessary parentheses around return type annotations (#​13381)
• Keep the opening parentheses on the same line as the if keyword for comprehensions where the condition has a leading comment (#​12282)
• More consistent formatting for with statements with a single context manager for Python 3.8 or older (#​10276)
• Correctly calculate the line-width for code blocks in docstrings when using max-doc-code-line-length = "dynamic" (#​13523)

Preview features

• [flake8-bugbear] Implement class-as-data-structure (B903) (#​9601)
• [flake8-type-checking] Apply quoted-type-alias more eagerly in TYPE_CHECKING blocks and ignore it in stubs (TC008) (#​15180)
• [pylint] Ignore eq-without-hash in stub files (PLW1641) (#​15310)
• [pyupgrade] Split UP007 into two individual rules: UP007 for Union and UP045 for Optional (UP007, UP045) (#​15313)
• [ruff] New rule that detects classes that are both an enum and a dataclass (RUF049) (#​15299)
• [ruff] Recode RUF025 to RUF037 (RUF037) (#​15258)

Rule changes

• [flake8-builtins] Ignore stdlib-module-shadowing in stub files(A005) (#​15350)
• [flake8-return] Add support for functions returning typing.Never (RET503) (#​15298)

Server

• Improve the observability by removing the need for the "trace" value to turn on or off logging. The server logging is solely controlled using the logLevel server setting
  which defaults to info. This addresses the issue where users were notified about an error and told to consult the log, but it didn’t contain any messages. (#​15232)
• Ignore diagnostics from other sources for code action requests (#​15373)

CLI

• Improve the error message for --config key=value when the key is for a table and it’s a simple value

Bug fixes

• [eradicate] Ignore metadata blocks directly followed by normal blocks (ERA001) (#​15330)
• [flake8-django] Recognize other magic methods (DJ012) (#​15365)
• [pycodestyle] Avoid false positives related to type aliases (E252) (#​15356)
• [pydocstyle] Avoid treating newline-separated sections as sub-sections (D405) (#​15311)
• [pyflakes] Remove call when removing final argument from format (F523) (#​15309)
• [refurb] Mark fix as unsafe when the right-hand side is a string (FURB171) (#​15273)
• [ruff] Treat ) as a regex metacharacter (RUF043, RUF055) (#​15318)
• [ruff] Parenthesize the int-call argument when removing the int call would change semantics (RUF046) (#​15277)

v0.8.6

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Preview features

• [format]: Preserve multiline implicit concatenated strings in docstring positions (#​15126)
• [ruff] Add rule to detect empty literal in deque call (RUF025) (#​15104)
• [ruff] Avoid reporting when ndigits is possibly negative (RUF057) (#​15234)

Rule changes

• [flake8-todos] remove issue code length restriction (TD003) (#​15175)
• [pyflakes] Ignore errors in @no_type_check string annotations (F722, F821) (#​15215)

CLI

• Show errors for attempted fixes only when passed --verbose (#​15237)

Bug fixes

• [ruff] Avoid syntax error when removing int over multiple lines (RUF046) (#​15230)
• [pyupgrade] Revert "Add all PEP-585 names to UP006 rule" (#​15250)

v0.8.5

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Preview features

• [airflow] Extend names moved from core to provider (AIR303) (#​15145, #​15159, #​15196, #​15216)
• [airflow] Extend rule to check class attributes, methods, arguments (AIR302) (#​15054, #​15083)
• [fastapi] Update FAST002 to check keyword-only arguments (#​15119)
• [flake8-type-checking] Disable TC006 and TC007 in stub files (#​15179)
• [pylint] Detect nested methods correctly (PLW1641) (#​15032)
• [ruff] Detect more strict-integer expressions (RUF046) (#​14833)
• [ruff] Implement falsy-dict-get-fallback (RUF056) (#​15160)
• [ruff] Implement unnecessary-round (RUF057) (#​14828)

Rule changes

• Visit PEP 764 inline TypedDict keys as non-type-expressions (#​15073)
• [flake8-comprehensions] Skip C416 if comprehension contains unpacking (#​14909)
• [flake8-pie] Allow cast(SomeType, ...) (PIE796) (#​15141)
• [flake8-simplify] More precise inference for dictionaries (SIM300) (#​15164)
• [flake8-use-pathlib] Catch redundant joins in PTH201 and avoid syntax errors (#​15177)
• [pycodestyle] Preserve original value format (E731) (#​15097)
• [pydocstyle] Split on first whitespace character (D403) (#​15082)
• [pyupgrade] Add all PEP-585 names to UP006 rule (#​5454)

Configuration

• [flake8-type-checking] Improve flexibility of runtime-evaluated-decorators (#​15204)
• [pydocstyle] Add setting to ignore missing documentation for *args and **kwargs parameters (D417) (#​15210)
• [ruff] Add an allowlist for unsafe-markup-use (RUF035) (#​15076)

Bug fixes

• Fix type subscript on older python versions (#​15090)
• Use TypeChecker for detecting fastapi routes (#​15093)
• [pycodestyle] Avoid false positives and negatives related to type parameter default syntax (E225, E251) (#​15214)

Documentation

• Fix incorrect doc in shebang-not-executable (EXE001) and add git+windows solution to executable bit (#​15208)
• Rename rules currently not conforming to naming convention (#​15102)

v0.8.4

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Preview features

• [airflow] Extend AIR302 with additional functions and classes (#​15015)
• [airflow] Implement moved-to-provider-in-3 for modules that has been moved to Airflow providers (AIR303) (#​14764)
• [flake8-use-pathlib] Extend check for invalid path suffix to include the case "." (PTH210) (#​14902)
• [perflint] Fix panic in PERF401 when list variable is after the for loop (#​14971)
• [perflint] Simplify finding the loop target in PERF401 (#​15025)
• [pylint] Preserve original value format (PLR6104) (#​14978)
• [ruff] Avoid false positives for RUF027 for typing context bindings (#​15037)
• [ruff] Check for ambiguous pattern passed to pytest.raises() (RUF043) (#​14966)

Rule changes

• [flake8-bandit] Check S105 for annotated assignment (#​15059)
• [flake8-pyi] More autofixes for redundant-none-literal (PYI061) (#​14872)
• [pydocstyle] Skip leading whitespace for D403 (#​14963)
• [ruff] Skip SQLModel base classes for mutable-class-default (RUF012) (#​14949)

Bug

• [perflint] Parenthesize walrus expressions in autofix for manual-list-comprehension (PERF401) (#​15050)

Server

• Check diagnostic refresh support from client capability which enables dynamic configuration for various editors (#​15014)

v0.8.3

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Preview features

• Fix fstring formatting removing overlong implicit concatenated string in expression part (#​14811)
• [airflow] Add fix to remove deprecated keyword arguments (AIR302) (#​14887)
• [airflow]: Extend rule to include deprecated names for Airflow 3.0 (AIR302) (#​14765 and #​14804)
• [flake8-bugbear] Improve error messages for except* (B025, B029, B030, B904) (#​14815)
• [flake8-bugbear] itertools.batched() without explicit strict (B911) (#​14408)
• [flake8-use-pathlib] Dotless suffix passed to Path.with_suffix() (PTH210) (#​14779)
• [pylint] Include parentheses and multiple comparators in check for boolean-chained-comparison (PLR1716) (#​14781)
• [ruff] Do not simplify round() calls (RUF046) (#​14832)
• [ruff] Don't emit used-dummy-variable on function parameters (RUF052) (#​14818)
• [ruff] Implement if-key-in-dict-del (RUF051) (#​14553)
• [ruff] Mark autofix for RUF052 as always unsafe (#​14824)
• [ruff] Teach autofix for used-dummy-variable about TypeVars etc. (RUF052) (#​14819)

Rule changes

• [flake8-bugbear] Offer unsafe autofix for no-explicit-stacklevel (B028) (#​14829)
• [flake8-pyi] Skip all type definitions in string-or-bytes-too-long (PYI053) (#​14797)
• [pyupgrade] Do not report when a UTF-8 comment is followed by a non-UTF-8 one (UP009) (#​14728)
• [pyupgrade] Mark fixes for convert-typed-dict-functional-to-class and convert-named-tuple-functional-to-class as unsafe if they will remove comments (UP013, UP014) (#​14842)

Bug fixes

• Raise syntax error for mixing except and except* (#​14895)
• [flake8-bugbear] Fix B028 to allow stacklevel to be explicitly assigned as a positional argument (#​14868)
• [flake8-bugbear] Skip B028 if warnings.warn is called with *args or **kwargs (#​14870)
• [flake8-comprehensions] Skip iterables with named expressions in unnecessary-map (C417) (#​14827)
• [flake8-pyi] Also remove self and cls's annotation (PYI034) (#​14801)
• [flake8-pytest-style] Fix pytest-parametrize-names-wrong-type (PT006) to edit both argnames and argvalues if both of them are single-element tuples/lists (#​14699)
• [perflint] Improve autofix for PERF401 (#​14369)
• [pylint] Fix PLW1508 false positive for default string created via a mult operation (#​14841)

v0.8.2

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Preview features

• [airflow] Avoid deprecated values (AIR302) (#​14582)
• [airflow] Extend removed names for AIR302 (#​14734)
• [ruff] Extend unnecessary-regular-expression to non-literal strings (RUF055) (#​14679)
• [ruff] Implement used-dummy-variable (RUF052) (#​14611)
• [ruff] Implement unnecessary-cast-to-int (RUF046) (#​14697)

Rule changes

• [airflow] Check AIR001 from builtin or providers operators module (#​14631)
• [flake8-pytest-style] Remove @ in pytest.mark.parametrize rule messages (#​14770)
• [pandas-vet] Skip rules if the panda module hasn't been seen (#​14671)
• [pylint] Fix false negatives for ascii and sorted in len-as-condition (PLC1802) (#​14692)
• [refurb] Guard hashlib imports and mark hashlib-digest-hex fix as safe (FURB181) (#​14694)

Configuration

• [flake8-import-conventions] Improve syntax check for aliases supplied in configuration for unconventional-import-alias (ICN001) (#​14745)

Bug fixes

• Revert: [pyflakes] Avoid false positives in @no_type_check contexts (F821, F722) (#​14615) (#​14726)
• [pep8-naming] Avoid false positive for class Bar(type(foo)) (N804) (#​14683)
• [pycodestyle] Handle f-strings properly for invalid-escape-sequence (W605) (#​14748)
• [pylint] Ignore @overload in PLR0904 (#​14730)
• [refurb] Handle non-finite decimals in verbose-decimal-constructor (FURB157) (#​14596)
• [ruff] Avoid emitting assignment-in-assert when all references to the assigned variable are themselves inside asserts (RUF018) (#​14661)

Documentation

• Improve docs for flake8-use-pathlib rules (#​14741)
• Improve error messages and docs for flake8-comprehensions rules (#​14729)
• [flake8-type-checking] Expands TC006 docs to better explain itself (#​14749)

v0.8.1

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Preview features

• Formatter: Avoid invalid syntax for format-spec with quotes for all Python versions (#​14625)
• Formatter: Consider quotes inside format-specs when choosing the quotes for an f-string (#​14493)
• Formatter: Do not consider f-strings with escaped newlines as multiline (#​14624)
• Formatter: Fix f-string formatting in assignment statement (#​14454)
• Formatter: Fix unnecessary space around power operator (**) in overlong f-string expressions (#​14489)
• [airflow] Avoid implicit schedule argument to DAG and @dag (AIR301) (#​14581)
• [flake8-builtins] Exempt private built-in modules (A005) (#​14505)
• [flake8-pytest-style] Fix pytest.mark.parametrize rules to check calls instead of decorators (#​14515)
• [flake8-type-checking] Implement runtime-cast-value (TC006) (#​14511)
• [flake8-type-checking] Implement unquoted-type-alias (TC007) and quoted-type-alias (TC008) (#​12927)
• [flake8-use-pathlib] Recommend Path.iterdir() over os.listdir() (PTH208) (#​14509)
• [pylint] Extend invalid-envvar-default to detect os.environ.get (PLW1508) (#​14512)
• [pylint] Implement len-test (PLC1802) (#​14309)
• [refurb] Fix bug where methods defined using lambdas were flagged by FURB118 (#​14639)
• [ruff] Auto-add r prefix when string has no backslashes for unraw-re-pattern (RUF039) (#​14536)
• [ruff] Implement invalid-assert-message-literal-argument (RUF040) (#​14488)
• [ruff] Implement unnecessary-nested-literal (RUF041) (#​14323)
• [ruff] Implement unnecessary-regular-expression (RUF055) (#​14659)

Rule changes

• Ignore more rules for stub files (#​14541)
• [pep8-naming] Eliminate false positives for single-letter names (N811, N814) (#​14584)
• [pyflakes] Avoid false positives in @no_type_check contexts (F821, F722) (#​14615)
• [ruff] Detect redirected-noqa in file-level comments (RUF101) (#​14635)
• [ruff] Mark fixes for unsorted-dunder-all and unsorted-dunder-slots as unsafe when there are complex comments in the sequence (RUF022, RUF023) (#​14560)

Bug fixes

• Avoid fixing code to None | None for redundant-none-literal (PYI061) and never-union (RUF020) (#​14583, #​14589)
• [flake8-bugbear] Fix mutable-contextvar-default to resolve annotated function calls properly (B039) (#​14532)
• [flake8-pyi, ruff] Fix traversal of nested literals and unions (PYI016, PYI051, PYI055, PYI062, RUF041) (#​14641)
• [flake8-pyi] Avoid rewriting invalid type expressions in unnecessary-type-union (PYI055) (#​14660)
• [flake8-type-checking] Avoid syntax errors and type checking problem for quoted annotations autofix (TC003, TC006) (#​14634)
• [pylint] Do not wrap function calls in parentheses in the fix for unnecessary-dunder-call (PLC2801) (#​14601)
• [ruff] Handle attrs's auto_attribs correctly (RUF009) (#​14520)

v0.8.0

Compare Source

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.

• Default to Python 3.9

  Ruff now defaults to Python 3.9 instead of 3.8 if no explicit Python version is configured using ruff.target-version or project.requires-python (#​13896)

• Changed location of pydoclint diagnostics

  pydoclint diagnostics now point to the first-line of the problematic docstring. Previously, this was not the case.

  If you've opted into these preview rules but have them suppressed using
  noqa comments in
  some places, this change may mean that you need to move the noqa suppression
  comments. Most users should be unaffected by this change.

• Use XDG (i.e. ~/.local/bin) instead of the Cargo home directory in the standalone installer

  Previously, Ruff's installer used $CARGO_HOME or ~/.cargo/bin for its target install directory. Now, Ruff will be installed into $XDG_BIN_HOME, $XDG_DATA_HOME/../bin, or ~/.local/bin (in that order).

  This change is only relevant to users of the standalone Ruff installer (using the shell or PowerShell script). If you installed Ruff using uv or pip, you should be unaffected.

• Changes to the line width calculation

  Ruff now uses a new version of the unicode-width Rust crate to calculate the line width. In very rare cases, this may lead to lines containing Unicode characters being reformatted, or being considered too long when they were not before (E501).

Removed Rules

The following deprecated rules have been removed:

• missing-type-self (ANN101)
• missing-type-cls (ANN102)
• syntax-error (E999)
• 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:

• flake8-type-checking: TCH to TC

Stabilization

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

• builtin-import-shadowing (A004)
• mutable-contextvar-default (B039)
• fast-api-redundant-response-model (FAST001)
• fast-api-non-annotated-dependency (FAST002)
• dict-index-missing-items (PLC0206)
• pep484-style-positional-only-argument (PYI063)
• redundant-final-literal (PYI064)
• bad-version-info-order (PYI066)
• parenthesize-chained-operators (RUF021)
• unsorted-dunder-all (RUF022)
• unsorted-dunder-slots (RUF023)
• assert-with-print-message (RUF030)
• unnecessary-default-type-args (UP043)

The following behaviors have been stabilized:

• ambiguous-variable-name (E741): Violations in stub files are now ignored. Stub authors typically don't control variable names.
• printf-string-formatting (UP031): Report all printf-like usages even if no autofix is available

The following fixes have been stabilized:

• zip-instead-of-pairwise (RUF007)

Preview features

• [flake8-datetimez] Exempt min.time() and max.time() (DTZ901) (#​14394)
• [flake8-pie] Mark fix as unsafe if the following statement is a string literal (PIE790) (#​14393)
• [flake8-pyi] New rule redundant-none-literal (PYI061) (#​14316)
• [flake8-pyi] Add autofix for redundant-numeric-union (PYI041) (#​14273)
• [ruff] New rule map-int-version-parsing (RUF048) (#​14373)
• [ruff] New rule redundant-bool-literal (RUF038) (#​14319)
• [ruff] New rule unraw-re-pattern (RUF039) (#​14446)
• [pycodestyle] Exempt pytest.importorskip() calls (E402) (#​14474)
• [pylint] Autofix suggests using sets when possible (PLR1714) (#​14372)

Rule changes

• invalid-pyproject-toml (RUF200): Updated to reflect the provisionally accepted PEP 639.
• [flake8-pyi] Avoid panic in unfixable case (PYI041) (#​14402)
• [flake8-type-checking] Correctly handle quotes in subscript expression when generating an autofix (#​14371)
• [pylint] Suggest correct autofix for __contains__ (PLC2801) (#​14424)

Configuration

• Ruff now emits a warning instead of an error when a configuration ignores a rule that has been removed (#​14435)
• Ruff now validates that lint.flake8-import-conventions.aliases only uses valid module names and aliases (#​14477)

v0.7.4

Compare Source

Preview features

• [flake8-datetimez] Detect usages of datetime.max/datetime.min (DTZ901) (#​14288)
• [flake8-logging] Implement root-logger-calls (LOG015) (#​14302)
• [flake8-no-pep420] Detect empty implicit namespace packages (INP001) (#​14236)
• [flake8-pyi] Add "replace with Self" fix (PYI019) (#​14238)
• [perflint]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.33%. Comparing base (8651274) to head (fe83592).

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #454   +/-   ##
=======================================
  Coverage   96.33%   96.33%           
=======================================
  Files          19       19           
  Lines        1310     1310           
=======================================
  Hits         1262     1262           
  Misses         48       48           

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