Update dependency ruff to v0.16.9

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
ruff (source, changelog)	0.16.5 → 0.16.9

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Release Notes

astral-sh/ruff (ruff)

v0.16.9

Compare Source

Released on 2026-09-24.

Preview features

• [ruff] Avoid false positives for overloaded division (RUF069) (#​28309)

Bug fixes

• [flake8-bugbear] Avoid false positives for calls with keyword arguments (B009, B010, B043) (#​28776)
• [flake8-tidy-imports] Allow lazy imports to be used in deferred annotations (TID255) (#​28767)

Rule changes

• Update LibCST-based fixes for Python 3.15 (#​28616)
• [flake8-pyi] Mention stubs in the diagnostic message (PYI002) (#​28542)

Documentation

• Fix horizontal overflow on the rules documentation page (#​28699)
• Update rules table with category information (#​28651)
• [flake8-annotations] Clarify that ANN401 checks return types in addition to arguments (#​28334)
• [flake8-bugbear] Document type-checker interaction (B010) (#​28509)
• [flake8-comprehensions] Document map/generator exception behavior (C417) (#​27794)
• [ruff] Mention related isort settings (RUF022) (#​28719)

Contributors

• @​qinpei-dev
• @​sanjayrohith
• @​ntBre
• @​webdevsamran
• @​zaniebot
• @​ewdurbin
• @​MichaReiser
• @​spaceone
• @​IbrahimKhan12
• @​devtechedge
• @​GruffElixir

v0.16.8

Compare Source

Released on 2026-09-16.

Bug fixes

• Visit functional TypedDict keyword arguments correctly (#​28584)
• [flake8-simplify] Detect nested async with under sync parent (SIM117) (#​27821)
• [flake8-simplify] Preserve operand order in SIM109 fix (#​27824)
• [pyupgrade] Preserve required parentheses in multiline UP040 fixes (#​28164)
• [pyupgrade] Skip TypeVarTuple and ParamSpec conversions with bounds or constraints (UP040, UP046, UP047) (#​28505)

Rule changes

• Add support for __lazy_modules__ (#​28459)
• Recognize PEP-728 TypedDict class keywords (#​28533)
• Recognize quoted types in typing.TypeForm (#​28507)
• Support conditional assignment to __lazy_modules__ (#​28491)
• [flake8-type-checking] Prefer lazy imports over TYPE_CHECKING on Python 3.15 and later (TC001, TC002, TC003) (#​28541)
• [pyupgrade] Make the fix for UP040 always unsafe (#​28526)
• [pyupgrade] Stop recommending deprecated ByteString aliases (UP035) (#​28498)
• [ruff, flake8-use-pathlib] Recognize the parent_mode argument (RUF064, PTH103) (#​28528)
• [ruff] Detect \Z in pytest.raises() match patterns (RUF043) (#​28598)

CLI

• Use rule name and code in formatter incompatibility warnings (#​28571)

Configuration

• [flake8-tidy-imports] Add extend-banned-api (#​28644)

Contributors

• @​VedantMadane
• @​alzeph
• @​charliermarsh
• @​fredrikblau
• @​ntBre
• @​zsol
• @​Aniket-a14
• @​r-b-1

v0.16.7

Compare Source

Released on 2026-09-10.

Preview features

• [ruff] Add rule for default values on method receivers (RUF077) (#​26700)
• [ruff] Recognize re.prefixmatch (RUF039, RUF055) (#​28311)

Bug fixes

• Alternate nested quotes inside format spec interpolations (#​28259)
• [flake8-implicit-str-concat] Mark fix unsafe when it creates a docstring (ISC003) (#​27981)
• [flake8-tidy-imports] Skip fixes for multi-member imports (TID254) (#​26584)
• [pylint] Gate ImportCycleError on Python 3.15 (PLW0133) (#​28310)

Rule changes

• Correct D211 and D203 rule conflict diagnostic (#​28444)
• Recognize slice and frozendict generics (#​28477)
• Stop defining __cached__ for Python 3.15 (#​28476)
• [pyupgrade] Stop recommending removed typing.no_type_check_decorator (UP035) (#​28475)

Performance

• Reuse parser name lookups when interning (#​28399)
• Speed up inherited configuration resolution (#​28299)

Documentation

• Fix line-length path in --config example (#​28392)
• Remove the "Who’s Using Ruff?" list (#​28455)

Other changes

• Embed archive checksums in the shell installer (#​28281)

Contributors

• @​The-Compiler
• @​mdiniz97
• @​zsol
• @​gorewilliams
• @​RafaelJohn9
• @​qatcod
• @​zanieb
• @​MichaReiser
• @​ntBre
• @​charliermarsh
• @​nightt5879
• @​jonathandung
• @​jogo-openai

v0.16.6

Compare Source

Released on 2026-09-03.

Preview features

• Move pytest-fixture-autouse to the restriction category (#​28219)
• [flake8-pytest-style] Add an autofix for PT020 (#​27993)
• [flake8-tidy-imports] Prevent fix loop between TID254 and TID255 (#​28262)
• [isort] Exclude pragma comments from line length calculation (I001) (#​27313)

Bug fixes

• Validate unary expressions when parsing (#​28233)
• [flake8-async, pylint] Recognize builtins.open (ASYNC230, PLW1514) (#​28021)
• [flake8-bugbear] Fix panic on match subjects (B031) (#​27781)
• [flake8-datetimez] Reject tzinfo=None for datetime bounds (DTZ901) (#​28022)
• [flake8-pytest-style] Avoid duplicate PT017 diagnostics (#​27918)
• [ruff] Remove lint.external hint for Ruff-specific suppressions (RUF102) (#​27923)

Rule changes

• [flake8-use-pathlib] Add display-only fix for os.listdir (PTH208) (#​28027)

Documentation

• Add another example and glob reference for lint.per-file-ignores (#​28106)
• Add duplicate work guidance (#​28229)
• [flake8-async] Document thread offloading (ASYNC240) (#​28008)
• [pyupgrade] Clarify default encoding argument handling (UP012) (#​27315)

Other changes

• Allow unary plus in match patterns on Python 3.15 (#​28231)

Contributors

• @​flying-sheep
• @​pikammmmm
• @​fly1d
• @​waterWang
• @​Pierre-Sassoulas
• @​ntBre
• @​jelle-openai
• @​ericbuehl
• @​tjkuson
• @​AbhinavMir
• @​Whning0513
• @​chirizxc

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