Feedback on new default rules #23203

ntBre · 2026-02-10T17:41:41Z

ntBre
Feb 10, 2026
Maintainer

We’ve been working on a new default rule set for Ruff with the goal of reducing the amount of configuration required to start using Ruff, while also capturing the benefits of rules that are currently disabled by default.

The proposed rule set is significantly larger than our current defaults, containing 436 rules, up from the 59 rules in the stable default set. It also expands beyond the primary focus on “correctness” rules in the current default set to include rules that are consistent with widely-accepted Python idioms or styles.

We’re hoping to release the new rules in preview this month, but even before that, we wanted to get some feedback on the rule set. You can find a simple ruff.toml file containing the new rule set attached to this post and in the collapsed section below. We’d love any feedback you have, but I’m also including some more specific prompts in the discussion thread.

Config file

[lint]
select = [
    # Current defaults
    "E722",  # https://docs.astral.sh/ruff/rules/bare-except
    "E902",  # https://docs.astral.sh/ruff/rules/io-error
    "F401",  # https://docs.astral.sh/ruff/rules/unused-import
    "F402",  # https://docs.astral.sh/ruff/rules/import-shadowed-by-loop-var
    "F404",  # https://docs.astral.sh/ruff/rules/late-future-import
    "F407",  # https://docs.astral.sh/ruff/rules/future-feature-not-defined
    "F501",  # https://docs.astral.sh/ruff/rules/percent-format-invalid-format
    "F502",  # https://docs.astral.sh/ruff/rules/percent-format-expected-mapping
    "F503",  # https://docs.astral.sh/ruff/rules/percent-format-expected-sequence
    "F504",  # https://docs.astral.sh/ruff/rules/percent-format-extra-named-arguments
    "F505",  # https://docs.astral.sh/ruff/rules/percent-format-missing-argument
    "F506",  # https://docs.astral.sh/ruff/rules/percent-format-mixed-positional-and-named
    "F507",  # https://docs.astral.sh/ruff/rules/percent-format-positional-count-mismatch
    "F508",  # https://docs.astral.sh/ruff/rules/percent-format-star-requires-sequence
    "F509",  # https://docs.astral.sh/ruff/rules/percent-format-unsupported-format-character
    "F521",  # https://docs.astral.sh/ruff/rules/string-dot-format-invalid-format
    "F522",  # https://docs.astral.sh/ruff/rules/string-dot-format-extra-named-arguments
    "F523",  # https://docs.astral.sh/ruff/rules/string-dot-format-extra-positional-arguments
    "F524",  # https://docs.astral.sh/ruff/rules/string-dot-format-missing-arguments
    "F525",  # https://docs.astral.sh/ruff/rules/string-dot-format-mixing-automatic
    "F541",  # https://docs.astral.sh/ruff/rules/f-string-missing-placeholders
    "F601",  # https://docs.astral.sh/ruff/rules/multi-value-repeated-key-literal
    "F602",  # https://docs.astral.sh/ruff/rules/multi-value-repeated-key-variable
    "F621",  # https://docs.astral.sh/ruff/rules/expressions-in-star-assignment
    "F622",  # https://docs.astral.sh/ruff/rules/multiple-starred-expressions
    "F631",  # https://docs.astral.sh/ruff/rules/assert-tuple
    "F632",  # https://docs.astral.sh/ruff/rules/is-literal
    "F633",  # https://docs.astral.sh/ruff/rules/invalid-print-syntax
    "F634",  # https://docs.astral.sh/ruff/rules/if-tuple
    "F701",  # https://docs.astral.sh/ruff/rules/break-outside-loop
    "F702",  # https://docs.astral.sh/ruff/rules/continue-outside-loop
    "F704",  # https://docs.astral.sh/ruff/rules/yield-outside-function
    "F706",  # https://docs.astral.sh/ruff/rules/return-outside-function
    "F707",  # https://docs.astral.sh/ruff/rules/default-except-not-last
    "F811",  # https://docs.astral.sh/ruff/rules/redefined-while-unused
    "F821",  # https://docs.astral.sh/ruff/rules/undefined-name
    "F822",  # https://docs.astral.sh/ruff/rules/undefined-export
    "F823",  # https://docs.astral.sh/ruff/rules/undefined-local
    "F841",  # https://docs.astral.sh/ruff/rules/unused-variable
    "F842",  # https://docs.astral.sh/ruff/rules/unused-annotation
    "F901",  # https://docs.astral.sh/ruff/rules/raise-not-implemented

    # New defaults
    "ASYNC100",  # https://docs.astral.sh/ruff/rules/cancel-scope-no-checkpoint
    "ASYNC105",  # https://docs.astral.sh/ruff/rules/trio-sync-call
    "ASYNC115",  # https://docs.astral.sh/ruff/rules/async-zero-sleep
    "ASYNC116",  # https://docs.astral.sh/ruff/rules/long-sleep-not-forever
    "ASYNC210",  # https://docs.astral.sh/ruff/rules/blocking-http-call-in-async-function
    "ASYNC220",  # https://docs.astral.sh/ruff/rules/create-subprocess-in-async-function
    "ASYNC221",  # https://docs.astral.sh/ruff/rules/run-process-in-async-function
    "ASYNC222",  # https://docs.astral.sh/ruff/rules/wait-for-process-in-async-function
    "ASYNC230",  # https://docs.astral.sh/ruff/rules/blocking-open-call-in-async-function
    "ASYNC251",  # https://docs.astral.sh/ruff/rules/blocking-sleep-in-async-function
    "B002",  # https://docs.astral.sh/ruff/rules/unary-prefix-increment-decrement
    "B003",  # https://docs.astral.sh/ruff/rules/assignment-to-os-environ
    "B004",  # https://docs.astral.sh/ruff/rules/unreliable-callable-check
    "B005",  # https://docs.astral.sh/ruff/rules/strip-with-multi-characters
    "B006",  # https://docs.astral.sh/ruff/rules/mutable-argument-default
    "B008",  # https://docs.astral.sh/ruff/rules/function-call-in-default-argument
    "B009",  # https://docs.astral.sh/ruff/rules/get-attr-with-constant
    "B010",  # https://docs.astral.sh/ruff/rules/set-attr-with-constant
    "B012",  # https://docs.astral.sh/ruff/rules/jump-statement-in-finally
    "B013",  # https://docs.astral.sh/ruff/rules/redundant-tuple-in-exception-handler
    "B014",  # https://docs.astral.sh/ruff/rules/duplicate-handler-exception
    "B015",  # https://docs.astral.sh/ruff/rules/useless-comparison
    "B016",  # https://docs.astral.sh/ruff/rules/raise-literal
    "B017",  # https://docs.astral.sh/ruff/rules/assert-raises-exception
    "B018",  # https://docs.astral.sh/ruff/rules/useless-expression
    "B019",  # https://docs.astral.sh/ruff/rules/cached-instance-method
    "B020",  # https://docs.astral.sh/ruff/rules/loop-variable-overrides-iterator
    "B021",  # https://docs.astral.sh/ruff/rules/f-string-docstring
    "B022",  # https://docs.astral.sh/ruff/rules/useless-contextlib-suppress
    "B023",  # https://docs.astral.sh/ruff/rules/function-uses-loop-variable
    "B025",  # https://docs.astral.sh/ruff/rules/duplicate-try-block-exception
    "B026",  # https://docs.astral.sh/ruff/rules/star-arg-unpacking-after-keyword-arg
    "B029",  # https://docs.astral.sh/ruff/rules/except-with-empty-tuple
    "B030",  # https://docs.astral.sh/ruff/rules/except-with-non-exception-classes
    "B031",  # https://docs.astral.sh/ruff/rules/reuse-of-groupby-generator
    "B032",  # https://docs.astral.sh/ruff/rules/unintentional-type-annotation
    "B033",  # https://docs.astral.sh/ruff/rules/duplicate-value
    "B035",  # https://docs.astral.sh/ruff/rules/static-key-dict-comprehension
    "B039",  # https://docs.astral.sh/ruff/rules/mutable-contextvar-default
    "BLE001",  # https://docs.astral.sh/ruff/rules/blind-except
    "C400",  # https://docs.astral.sh/ruff/rules/unnecessary-generator-list
    "C401",  # https://docs.astral.sh/ruff/rules/unnecessary-generator-set
    "C402",  # https://docs.astral.sh/ruff/rules/unnecessary-generator-dict
    "C403",  # https://docs.astral.sh/ruff/rules/unnecessary-list-comprehension-set
    "C404",  # https://docs.astral.sh/ruff/rules/unnecessary-list-comprehension-dict
    "C405",  # https://docs.astral.sh/ruff/rules/unnecessary-literal-set
    "C406",  # https://docs.astral.sh/ruff/rules/unnecessary-literal-dict
    "C408",  # https://docs.astral.sh/ruff/rules/unnecessary-collection-call
    "C409",  # https://docs.astral.sh/ruff/rules/unnecessary-literal-within-tuple-call
    "C410",  # https://docs.astral.sh/ruff/rules/unnecessary-literal-within-list-call
    "C411",  # https://docs.astral.sh/ruff/rules/unnecessary-list-call
    "C413",  # https://docs.astral.sh/ruff/rules/unnecessary-call-around-sorted
    "C414",  # https://docs.astral.sh/ruff/rules/unnecessary-double-cast-or-process
    "C415",  # https://docs.astral.sh/ruff/rules/unnecessary-subscript-reversal
    "C417",  # https://docs.astral.sh/ruff/rules/unnecessary-map
    "C418",  # https://docs.astral.sh/ruff/rules/unnecessary-literal-within-dict-call
    "C419",  # https://docs.astral.sh/ruff/rules/unnecessary-comprehension-in-call
    "D419",  # https://docs.astral.sh/ruff/rules/empty-docstring
    "DTZ001",  # https://docs.astral.sh/ruff/rules/call-datetime-without-tzinfo
    "DTZ002",  # https://docs.astral.sh/ruff/rules/call-datetime-today
    "DTZ003",  # https://docs.astral.sh/ruff/rules/call-datetime-utcnow
    "DTZ004",  # https://docs.astral.sh/ruff/rules/call-datetime-utcfromtimestamp
    "DTZ005",  # https://docs.astral.sh/ruff/rules/call-datetime-now-without-tzinfo
    "DTZ006",  # https://docs.astral.sh/ruff/rules/call-datetime-fromtimestamp
    "DTZ007",  # https://docs.astral.sh/ruff/rules/call-datetime-strptime-without-zone
    "DTZ011",  # https://docs.astral.sh/ruff/rules/call-date-today
    "DTZ012",  # https://docs.astral.sh/ruff/rules/call-date-fromtimestamp
    "DTZ901",  # https://docs.astral.sh/ruff/rules/datetime-min-max
    "EXE001",  # https://docs.astral.sh/ruff/rules/shebang-not-executable
    "EXE002",  # https://docs.astral.sh/ruff/rules/shebang-missing-executable-file
    "EXE004",  # https://docs.astral.sh/ruff/rules/shebang-leading-whitespace
    "EXE005",  # https://docs.astral.sh/ruff/rules/shebang-not-first-line
    "FA100",  # https://docs.astral.sh/ruff/rules/future-rewritable-type-annotation
    "FA102",  # https://docs.astral.sh/ruff/rules/future-required-type-annotation
    "FLY002",  # https://docs.astral.sh/ruff/rules/static-join-to-f-string
    "FURB105",  # https://docs.astral.sh/ruff/rules/print-empty-string
    "FURB122",  # https://docs.astral.sh/ruff/rules/for-loop-writes
    "FURB129",  # https://docs.astral.sh/ruff/rules/readlines-in-for
    "FURB132",  # https://docs.astral.sh/ruff/rules/check-and-remove-from-set
    "FURB136",  # https://docs.astral.sh/ruff/rules/if-expr-min-max
    "FURB157",  # https://docs.astral.sh/ruff/rules/verbose-decimal-constructor
    "FURB161",  # https://docs.astral.sh/ruff/rules/bit-count
    "FURB162",  # https://docs.astral.sh/ruff/rules/fromisoformat-replace-z
    "FURB163",  # https://docs.astral.sh/ruff/rules/redundant-log-base
    "FURB166",  # https://docs.astral.sh/ruff/rules/int-on-sliced-str
    "FURB167",  # https://docs.astral.sh/ruff/rules/regex-flag-alias
    "FURB168",  # https://docs.astral.sh/ruff/rules/isinstance-type-none
    "FURB169",  # https://docs.astral.sh/ruff/rules/type-none-comparison
    "FURB177",  # https://docs.astral.sh/ruff/rules/implicit-cwd
    "FURB181",  # https://docs.astral.sh/ruff/rules/hashlib-digest-hex
    "FURB188",  # https://docs.astral.sh/ruff/rules/slice-to-remove-prefix-or-suffix
    "G010",  # https://docs.astral.sh/ruff/rules/logging-warn
    "G101",  # https://docs.astral.sh/ruff/rules/logging-extra-attr-clash
    "G201",  # https://docs.astral.sh/ruff/rules/logging-exc-info
    "G202",  # https://docs.astral.sh/ruff/rules/logging-redundant-exc-info
    "I001",  # https://docs.astral.sh/ruff/rules/unsorted-imports
    "INT001",  # https://docs.astral.sh/ruff/rules/f-string-in-get-text-func-call
    "INT002",  # https://docs.astral.sh/ruff/rules/format-in-get-text-func-call
    "INT003",  # https://docs.astral.sh/ruff/rules/printf-in-get-text-func-call
    "LOG001",  # https://docs.astral.sh/ruff/rules/direct-logger-instantiation
    "LOG002",  # https://docs.astral.sh/ruff/rules/invalid-get-logger-argument
    "LOG009",  # https://docs.astral.sh/ruff/rules/undocumented-warn
    "LOG014",  # https://docs.astral.sh/ruff/rules/exc-info-outside-except-handler
    "LOG015",  # https://docs.astral.sh/ruff/rules/root-logger-call
    "N999",  # https://docs.astral.sh/ruff/rules/invalid-module-name
    "PERF101",  # https://docs.astral.sh/ruff/rules/unnecessary-list-cast
    "PERF102",  # https://docs.astral.sh/ruff/rules/incorrect-dict-iterator
    "PERF401",  # https://docs.astral.sh/ruff/rules/manual-list-comprehension
    "PERF402",  # https://docs.astral.sh/ruff/rules/manual-list-copy
    "PERF403",  # https://docs.astral.sh/ruff/rules/manual-dict-comprehension
    "PGH005",  # https://docs.astral.sh/ruff/rules/invalid-mock-access
    "PIE790",  # https://docs.astral.sh/ruff/rules/unnecessary-placeholder
    "PIE794",  # https://docs.astral.sh/ruff/rules/duplicate-class-field-definition
    "PIE796",  # https://docs.astral.sh/ruff/rules/non-unique-enums
    "PIE800",  # https://docs.astral.sh/ruff/rules/unnecessary-spread
    "PIE804",  # https://docs.astral.sh/ruff/rules/unnecessary-dict-kwargs
    "PIE807",  # https://docs.astral.sh/ruff/rules/reimplemented-container-builtin
    "PIE808",  # https://docs.astral.sh/ruff/rules/unnecessary-range-start
    "PIE810",  # https://docs.astral.sh/ruff/rules/multiple-starts-ends-with
    "PLC0105",  # https://docs.astral.sh/ruff/rules/type-name-incorrect-variance
    "PLC0131",  # https://docs.astral.sh/ruff/rules/type-bivariance
    "PLC0132",  # https://docs.astral.sh/ruff/rules/type-param-name-mismatch
    "PLC0205",  # https://docs.astral.sh/ruff/rules/single-string-slots
    "PLC0206",  # https://docs.astral.sh/ruff/rules/dict-index-missing-items
    "PLC0208",  # https://docs.astral.sh/ruff/rules/iteration-over-set
    "PLC0414",  # https://docs.astral.sh/ruff/rules/useless-import-alias
    "PLC3002",  # https://docs.astral.sh/ruff/rules/unnecessary-direct-lambda-call
    "PLE0100",  # https://docs.astral.sh/ruff/rules/yield-in-init
    "PLE0101",  # https://docs.astral.sh/ruff/rules/return-in-init
    "PLE0115",  # https://docs.astral.sh/ruff/rules/nonlocal-and-global
    "PLE0116",  # https://docs.astral.sh/ruff/rules/continue-in-finally
    "PLE0117",  # https://docs.astral.sh/ruff/rules/nonlocal-without-binding
    "PLE0118",  # https://docs.astral.sh/ruff/rules/load-before-global-declaration
    "PLE0303",  # https://docs.astral.sh/ruff/rules/invalid-length-return-type
    "PLE0305",  # https://docs.astral.sh/ruff/rules/invalid-index-return-type
    "PLE0307",  # https://docs.astral.sh/ruff/rules/invalid-str-return-type
    "PLE0308",  # https://docs.astral.sh/ruff/rules/invalid-bytes-return-type
    "PLE0309",  # https://docs.astral.sh/ruff/rules/invalid-hash-return-type
    "PLE0604",  # https://docs.astral.sh/ruff/rules/invalid-all-object
    "PLE0605",  # https://docs.astral.sh/ruff/rules/invalid-all-format
    "PLE0643",  # https://docs.astral.sh/ruff/rules/potential-index-error
    "PLE0704",  # https://docs.astral.sh/ruff/rules/misplaced-bare-raise
    "PLE1132",  # https://docs.astral.sh/ruff/rules/repeated-keyword-argument
    "PLE1142",  # https://docs.astral.sh/ruff/rules/await-outside-async
    "PLE1205",  # https://docs.astral.sh/ruff/rules/logging-too-many-args
    "PLE1206",  # https://docs.astral.sh/ruff/rules/logging-too-few-args
    "PLE1300",  # https://docs.astral.sh/ruff/rules/bad-string-format-character
    "PLE1307",  # https://docs.astral.sh/ruff/rules/bad-string-format-type
    "PLE1310",  # https://docs.astral.sh/ruff/rules/bad-str-strip-call
    "PLE1507",  # https://docs.astral.sh/ruff/rules/invalid-envvar-value
    "PLE1519",  # https://docs.astral.sh/ruff/rules/singledispatch-method
    "PLE1520",  # https://docs.astral.sh/ruff/rules/singledispatchmethod-function
    "PLE1700",  # https://docs.astral.sh/ruff/rules/yield-from-in-async-function
    "PLE2502",  # https://docs.astral.sh/ruff/rules/bidirectional-unicode
    "PLE2510",  # https://docs.astral.sh/ruff/rules/invalid-character-backspace
    "PLE2512",  # https://docs.astral.sh/ruff/rules/invalid-character-sub
    "PLE2513",  # https://docs.astral.sh/ruff/rules/invalid-character-esc
    "PLE2514",  # https://docs.astral.sh/ruff/rules/invalid-character-nul
    "PLE2515",  # https://docs.astral.sh/ruff/rules/invalid-character-zero-width-space
    "PLR0124",  # https://docs.astral.sh/ruff/rules/comparison-with-itself
    "PLR0133",  # https://docs.astral.sh/ruff/rules/comparison-of-constant
    "PLR0206",  # https://docs.astral.sh/ruff/rules/property-with-parameters
    "PLR0402",  # https://docs.astral.sh/ruff/rules/manual-from-import
    "PLR1704",  # https://docs.astral.sh/ruff/rules/redefined-argument-from-local
    "PLR1711",  # https://docs.astral.sh/ruff/rules/useless-return
    "PLR1714",  # https://docs.astral.sh/ruff/rules/repeated-equality-comparison
    "PLR1716",  # https://docs.astral.sh/ruff/rules/boolean-chained-comparison
    "PLR1722",  # https://docs.astral.sh/ruff/rules/sys-exit-alias
    "PLR1730",  # https://docs.astral.sh/ruff/rules/if-stmt-min-max
    "PLR1733",  # https://docs.astral.sh/ruff/rules/unnecessary-dict-index-lookup
    "PLR1736",  # https://docs.astral.sh/ruff/rules/unnecessary-list-index-lookup
    "PLR2044",  # https://docs.astral.sh/ruff/rules/empty-comment
    "PLW0120",  # https://docs.astral.sh/ruff/rules/useless-else-on-loop
    "PLW0127",  # https://docs.astral.sh/ruff/rules/self-assigning-variable
    "PLW0128",  # https://docs.astral.sh/ruff/rules/redeclared-assigned-name
    "PLW0129",  # https://docs.astral.sh/ruff/rules/assert-on-string-literal
    "PLW0131",  # https://docs.astral.sh/ruff/rules/named-expr-without-context
    "PLW0133",  # https://docs.astral.sh/ruff/rules/useless-exception-statement
    "PLW0177",  # https://docs.astral.sh/ruff/rules/nan-comparison
    "PLW0211",  # https://docs.astral.sh/ruff/rules/bad-staticmethod-argument
    "PLW0245",  # https://docs.astral.sh/ruff/rules/super-without-brackets
    "PLW0406",  # https://docs.astral.sh/ruff/rules/import-self
    "PLW0602",  # https://docs.astral.sh/ruff/rules/global-variable-not-assigned
    "PLW0604",  # https://docs.astral.sh/ruff/rules/global-at-module-level
    "PLW0642",  # https://docs.astral.sh/ruff/rules/self-or-cls-assignment
    "PLW0711",  # https://docs.astral.sh/ruff/rules/binary-op-exception
    "PLW1501",  # https://docs.astral.sh/ruff/rules/bad-open-mode
    "PLW1507",  # https://docs.astral.sh/ruff/rules/shallow-copy-environ
    "PLW1508",  # https://docs.astral.sh/ruff/rules/invalid-envvar-default
    "PLW1509",  # https://docs.astral.sh/ruff/rules/subprocess-popen-preexec-fn
    "PLW1510",  # https://docs.astral.sh/ruff/rules/subprocess-run-without-check
    "PLW2101",  # https://docs.astral.sh/ruff/rules/useless-with-lock
    "PT010",  # https://docs.astral.sh/ruff/rules/pytest-raises-without-exception
    "PT014",  # https://docs.astral.sh/ruff/rules/pytest-duplicate-parametrize-test-cases
    "PT020",  # https://docs.astral.sh/ruff/rules/pytest-deprecated-yield-fixture
    "PT025",  # https://docs.astral.sh/ruff/rules/pytest-erroneous-use-fixtures-on-fixture
    "PT026",  # https://docs.astral.sh/ruff/rules/pytest-use-fixtures-without-parameters
    "PT031",  # https://docs.astral.sh/ruff/rules/pytest-warns-with-multiple-statements
    "PTH124",  # https://docs.astral.sh/ruff/rules/py-path
    "PTH210",  # https://docs.astral.sh/ruff/rules/invalid-pathlib-with-suffix
    "PYI001",  # https://docs.astral.sh/ruff/rules/unprefixed-type-param
    "PYI002",  # https://docs.astral.sh/ruff/rules/complex-if-statement-in-stub
    "PYI003",  # https://docs.astral.sh/ruff/rules/unrecognized-version-info-check
    "PYI004",  # https://docs.astral.sh/ruff/rules/patch-version-comparison
    "PYI005",  # https://docs.astral.sh/ruff/rules/wrong-tuple-length-version-comparison
    "PYI006",  # https://docs.astral.sh/ruff/rules/bad-version-info-comparison
    "PYI007",  # https://docs.astral.sh/ruff/rules/unrecognized-platform-check
    "PYI008",  # https://docs.astral.sh/ruff/rules/unrecognized-platform-name
    "PYI009",  # https://docs.astral.sh/ruff/rules/pass-statement-stub-body
    "PYI010",  # https://docs.astral.sh/ruff/rules/non-empty-stub-body
    "PYI012",  # https://docs.astral.sh/ruff/rules/pass-in-class-body
    "PYI013",  # https://docs.astral.sh/ruff/rules/ellipsis-in-non-empty-class-body
    "PYI015",  # https://docs.astral.sh/ruff/rules/assignment-default-in-stub
    "PYI016",  # https://docs.astral.sh/ruff/rules/duplicate-union-member
    "PYI017",  # https://docs.astral.sh/ruff/rules/complex-assignment-in-stub
    "PYI018",  # https://docs.astral.sh/ruff/rules/unused-private-type-var
    "PYI019",  # https://docs.astral.sh/ruff/rules/custom-type-var-for-self
    "PYI020",  # https://docs.astral.sh/ruff/rules/quoted-annotation-in-stub
    "PYI025",  # https://docs.astral.sh/ruff/rules/unaliased-collections-abc-set-import
    "PYI026",  # https://docs.astral.sh/ruff/rules/type-alias-without-annotation
    "PYI029",  # https://docs.astral.sh/ruff/rules/str-or-repr-defined-in-stub
    "PYI030",  # https://docs.astral.sh/ruff/rules/unnecessary-literal-union
    "PYI032",  # https://docs.astral.sh/ruff/rules/any-eq-ne-annotation
    "PYI033",  # https://docs.astral.sh/ruff/rules/type-comment-in-stub
    "PYI034",  # https://docs.astral.sh/ruff/rules/non-self-return-type
    "PYI035",  # https://docs.astral.sh/ruff/rules/unassigned-special-variable-in-stub
    "PYI036",  # https://docs.astral.sh/ruff/rules/bad-exit-annotation
    "PYI041",  # https://docs.astral.sh/ruff/rules/redundant-numeric-union
    "PYI042",  # https://docs.astral.sh/ruff/rules/snake-case-type-alias
    "PYI043",  # https://docs.astral.sh/ruff/rules/t-suffixed-type-alias
    "PYI044",  # https://docs.astral.sh/ruff/rules/future-annotations-in-stub
    "PYI045",  # https://docs.astral.sh/ruff/rules/iter-method-return-iterable
    "PYI046",  # https://docs.astral.sh/ruff/rules/unused-private-protocol
    "PYI047",  # https://docs.astral.sh/ruff/rules/unused-private-type-alias
    "PYI048",  # https://docs.astral.sh/ruff/rules/stub-body-multiple-statements
    "PYI049",  # https://docs.astral.sh/ruff/rules/unused-private-typed-dict
    "PYI050",  # https://docs.astral.sh/ruff/rules/no-return-argument-annotation-in-stub
    "PYI052",  # https://docs.astral.sh/ruff/rules/unannotated-assignment-in-stub
    "PYI055",  # https://docs.astral.sh/ruff/rules/unnecessary-type-union
    "PYI057",  # https://docs.astral.sh/ruff/rules/byte-string-usage
    "PYI058",  # https://docs.astral.sh/ruff/rules/generator-return-from-iter-method
    "PYI059",  # https://docs.astral.sh/ruff/rules/generic-not-last-base-class
    "PYI061",  # https://docs.astral.sh/ruff/rules/redundant-none-literal
    "PYI062",  # https://docs.astral.sh/ruff/rules/duplicate-literal-member
    "PYI063",  # https://docs.astral.sh/ruff/rules/pep484-style-positional-only-parameter
    "PYI064",  # https://docs.astral.sh/ruff/rules/redundant-final-literal
    "PYI066",  # https://docs.astral.sh/ruff/rules/bad-version-info-order
    "RET501",  # https://docs.astral.sh/ruff/rules/unnecessary-return-none
    "RET504",  # https://docs.astral.sh/ruff/rules/unnecessary-assign
    "RUF007",  # https://docs.astral.sh/ruff/rules/zip-instead-of-pairwise
    "RUF008",  # https://docs.astral.sh/ruff/rules/mutable-dataclass-default
    "RUF009",  # https://docs.astral.sh/ruff/rules/function-call-in-dataclass-default-argument
    "RUF010",  # https://docs.astral.sh/ruff/rules/explicit-f-string-type-conversion
    "RUF012",  # https://docs.astral.sh/ruff/rules/mutable-class-default
    "RUF013",  # https://docs.astral.sh/ruff/rules/implicit-optional
    "RUF015",  # https://docs.astral.sh/ruff/rules/unnecessary-iterable-allocation-for-first-element
    "RUF016",  # https://docs.astral.sh/ruff/rules/invalid-index-type
    "RUF017",  # https://docs.astral.sh/ruff/rules/quadratic-list-summation
    "RUF018",  # https://docs.astral.sh/ruff/rules/assignment-in-assert
    "RUF019",  # https://docs.astral.sh/ruff/rules/unnecessary-key-check
    "RUF020",  # https://docs.astral.sh/ruff/rules/never-union
    "RUF022",  # https://docs.astral.sh/ruff/rules/unsorted-dunder-all
    "RUF023",  # https://docs.astral.sh/ruff/rules/unsorted-dunder-slots
    "RUF024",  # https://docs.astral.sh/ruff/rules/mutable-fromkeys-value
    "RUF026",  # https://docs.astral.sh/ruff/rules/default-factory-kwarg
    "RUF028",  # https://docs.astral.sh/ruff/rules/invalid-formatter-suppression-comment
    "RUF030",  # https://docs.astral.sh/ruff/rules/assert-with-print-message
    "RUF032",  # https://docs.astral.sh/ruff/rules/decimal-from-float-literal
    "RUF033",  # https://docs.astral.sh/ruff/rules/post-init-default
    "RUF034",  # https://docs.astral.sh/ruff/rules/useless-if-else
    "RUF040",  # https://docs.astral.sh/ruff/rules/invalid-assert-message-literal-argument
    "RUF041",  # https://docs.astral.sh/ruff/rules/unnecessary-nested-literal
    "RUF046",  # https://docs.astral.sh/ruff/rules/unnecessary-cast-to-int
    "RUF048",  # https://docs.astral.sh/ruff/rules/map-int-version-parsing
    "RUF049",  # https://docs.astral.sh/ruff/rules/dataclass-enum
    "RUF051",  # https://docs.astral.sh/ruff/rules/if-key-in-dict-del
    "RUF053",  # https://docs.astral.sh/ruff/rules/class-with-mixed-type-vars
    "RUF057",  # https://docs.astral.sh/ruff/rules/unnecessary-round
    "RUF058",  # https://docs.astral.sh/ruff/rules/starmap-zip
    "RUF059",  # https://docs.astral.sh/ruff/rules/unused-unpacked-variable
    "RUF100",  # https://docs.astral.sh/ruff/rules/unused-noqa
    "RUF101",  # https://docs.astral.sh/ruff/rules/redirected-noqa
    "RUF200",  # https://docs.astral.sh/ruff/rules/invalid-pyproject-toml
    "S102",  # https://docs.astral.sh/ruff/rules/exec-builtin
    "S110",  # https://docs.astral.sh/ruff/rules/try-except-pass
    "S112",  # https://docs.astral.sh/ruff/rules/try-except-continue
    "SIM101",  # https://docs.astral.sh/ruff/rules/duplicate-isinstance-call
    "SIM102",  # https://docs.astral.sh/ruff/rules/collapsible-if
    "SIM103",  # https://docs.astral.sh/ruff/rules/needless-bool
    "SIM107",  # https://docs.astral.sh/ruff/rules/return-in-try-except-finally
    "SIM113",  # https://docs.astral.sh/ruff/rules/enumerate-for-loop
    "SIM114",  # https://docs.astral.sh/ruff/rules/if-with-same-arms
    "SIM115",  # https://docs.astral.sh/ruff/rules/open-file-with-context-handler
    "SIM117",  # https://docs.astral.sh/ruff/rules/multiple-with-statements
    "SIM118",  # https://docs.astral.sh/ruff/rules/in-dict-keys
    "SIM201",  # https://docs.astral.sh/ruff/rules/negate-equal-op
    "SIM202",  # https://docs.astral.sh/ruff/rules/negate-not-equal-op
    "SIM208",  # https://docs.astral.sh/ruff/rules/double-negation
    "SIM210",  # https://docs.astral.sh/ruff/rules/if-expr-with-true-false
    "SIM211",  # https://docs.astral.sh/ruff/rules/if-expr-with-false-true
    "SIM220",  # https://docs.astral.sh/ruff/rules/expr-and-not-expr
    "SIM221",  # https://docs.astral.sh/ruff/rules/expr-or-not-expr
    "SIM222",  # https://docs.astral.sh/ruff/rules/expr-or-true
    "SIM223",  # https://docs.astral.sh/ruff/rules/expr-and-false
    "SIM401",  # https://docs.astral.sh/ruff/rules/if-else-block-instead-of-dict-get
    "SIM905",  # https://docs.astral.sh/ruff/rules/split-static-string
    "SIM911",  # https://docs.astral.sh/ruff/rules/zip-dict-keys-and-values
    "T100",  # https://docs.astral.sh/ruff/rules/debugger
    "TC004",  # https://docs.astral.sh/ruff/rules/runtime-import-in-type-checking-block
    "TC005",  # https://docs.astral.sh/ruff/rules/empty-type-checking-block
    "TC007",  # https://docs.astral.sh/ruff/rules/unquoted-type-alias
    "TC010",  # https://docs.astral.sh/ruff/rules/runtime-string-union
    "TRY002",  # https://docs.astral.sh/ruff/rules/raise-vanilla-class
    "TRY004",  # https://docs.astral.sh/ruff/rules/type-check-without-type-error
    "TRY201",  # https://docs.astral.sh/ruff/rules/verbose-raise
    "TRY203",  # https://docs.astral.sh/ruff/rules/useless-try-except
    "TRY300",  # https://docs.astral.sh/ruff/rules/try-consider-else
    "TRY401",  # https://docs.astral.sh/ruff/rules/verbose-log-message
    "UP001",  # https://docs.astral.sh/ruff/rules/useless-metaclass-type
    "UP003",  # https://docs.astral.sh/ruff/rules/type-of-primitive
    "UP004",  # https://docs.astral.sh/ruff/rules/useless-object-inheritance
    "UP005",  # https://docs.astral.sh/ruff/rules/deprecated-unittest-alias
    "UP006",  # https://docs.astral.sh/ruff/rules/non-pep585-annotation
    "UP007",  # https://docs.astral.sh/ruff/rules/non-pep604-annotation-union
    "UP008",  # https://docs.astral.sh/ruff/rules/super-call-with-parameters
    "UP009",  # https://docs.astral.sh/ruff/rules/utf8-encoding-declaration
    "UP010",  # https://docs.astral.sh/ruff/rules/unnecessary-future-import
    "UP011",  # https://docs.astral.sh/ruff/rules/lru-cache-without-parameters
    "UP012",  # https://docs.astral.sh/ruff/rules/unnecessary-encode-utf8
    "UP014",  # https://docs.astral.sh/ruff/rules/convert-named-tuple-functional-to-class
    "UP017",  # https://docs.astral.sh/ruff/rules/datetime-timezone-utc
    "UP018",  # https://docs.astral.sh/ruff/rules/native-literals
    "UP019",  # https://docs.astral.sh/ruff/rules/typing-text-str-alias
    "UP020",  # https://docs.astral.sh/ruff/rules/open-alias
    "UP021",  # https://docs.astral.sh/ruff/rules/replace-universal-newlines
    "UP022",  # https://docs.astral.sh/ruff/rules/replace-stdout-stderr
    "UP023",  # https://docs.astral.sh/ruff/rules/deprecated-c-element-tree
    "UP024",  # https://docs.astral.sh/ruff/rules/os-error-alias
    "UP025",  # https://docs.astral.sh/ruff/rules/unicode-kind-prefix
    "UP026",  # https://docs.astral.sh/ruff/rules/deprecated-mock-import
    "UP028",  # https://docs.astral.sh/ruff/rules/yield-in-for-loop
    "UP029",  # https://docs.astral.sh/ruff/rules/unnecessary-builtin-import
    "UP030",  # https://docs.astral.sh/ruff/rules/format-literals
    "UP031",  # https://docs.astral.sh/ruff/rules/printf-string-formatting
    "UP032",  # https://docs.astral.sh/ruff/rules/f-string
    "UP033",  # https://docs.astral.sh/ruff/rules/lru-cache-with-maxsize-none
    "UP034",  # https://docs.astral.sh/ruff/rules/extraneous-parentheses
    "UP035",  # https://docs.astral.sh/ruff/rules/deprecated-import
    "UP036",  # https://docs.astral.sh/ruff/rules/outdated-version-block
    "UP037",  # https://docs.astral.sh/ruff/rules/quoted-annotation
    "UP039",  # https://docs.astral.sh/ruff/rules/unnecessary-class-parentheses
    "UP040",  # https://docs.astral.sh/ruff/rules/non-pep695-type-alias
    "UP041",  # https://docs.astral.sh/ruff/rules/timeout-error-alias
    "UP043",  # https://docs.astral.sh/ruff/rules/unnecessary-default-type-args
    "UP044",  # https://docs.astral.sh/ruff/rules/non-pep646-unpack
    "UP045",  # https://docs.astral.sh/ruff/rules/non-pep604-annotation-optional
    "UP046",  # https://docs.astral.sh/ruff/rules/non-pep695-generic-class
    "UP047",  # https://docs.astral.sh/ruff/rules/non-pep695-generic-function
    "UP049",  # https://docs.astral.sh/ruff/rules/private-type-parameter
    "UP050",  # https://docs.astral.sh/ruff/rules/useless-class-metaclass-type
    "W605",  # https://docs.astral.sh/ruff/rules/invalid-escape-sequence
    "YTT101",  # https://docs.astral.sh/ruff/rules/sys-version-slice3
    "YTT102",  # https://docs.astral.sh/ruff/rules/sys-version2
    "YTT103",  # https://docs.astral.sh/ruff/rules/sys-version-cmp-str3
    "YTT201",  # https://docs.astral.sh/ruff/rules/sys-version-info0-eq3
    "YTT202",  # https://docs.astral.sh/ruff/rules/six-py3
    "YTT203",  # https://docs.astral.sh/ruff/rules/sys-version-info1-cmp-int
    "YTT204",  # https://docs.astral.sh/ruff/rules/sys-version-info-minor-cmp-int
    "YTT301",  # https://docs.astral.sh/ruff/rules/sys-version0
    "YTT302",  # https://docs.astral.sh/ruff/rules/sys-version-cmp-str10
    "YTT303",  # https://docs.astral.sh/ruff/rules/sys-version-slice1
]

ruff.txt (TOML file with the extension changed for GitHub's upload requirements)

You should be able to try this out in your own project with something like:

ruff check --isolated --no-cache --config "$(curl -L https://github.com/user-attachments/files/25394860/annotated.txt)"

ntBre · 2026-02-10T17:41:59Z

ntBre
Feb 10, 2026
Maintainer Author

Upvote this comment if you often use Ruff’s current default rules instead of overriding them entirely with select or otherwise

0 replies

ntBre · 2026-02-10T17:42:20Z

ntBre
Feb 10, 2026
Maintainer Author

Respond to this comment if there are any rules included in this list that you would disable for your projects if this became the default rule set

17 replies

ntBre Feb 18, 2026
Maintainer Author

Thanks all for the feedback! I'm incorporating it into the first draft of the new rule set in #23385.

@Avasam I think the issue with TC004 may be resolved. At least I can't seem to get a diagnostic in the playground using the snippet from your comment. But thank you for bringing that to my attention. I'd be fine leaving out TC004 (or even the other TC rules) if I'm missing something there.

I think I agree with the rest of your suggestions. I've been on the fence about including any of the N rules and seeing that #15296 is still open is a good enough argument for me just to remove them from the set for now.

The one rule I might push back on slightly is PT012. I'm not sure if this pattern was previously more common in setuptools (or if we've refined the rule since the ignore was added!), but I ran a quick check and only got three PT012 diagnostics, all of which looked pretty easy to fix. I'm still okay removing it for now though :)

ruff check setuptools

❯ ruff check --no-cache --select PT012
PT012 `pytest.raises()` block should contain a single simple statement
  --> setuptools/tests/config/test_setupcfg.py:78:5
   |
77 |   def test_parsers_implemented():
78 | /     with pytest.raises(NotImplementedError):
79 | |         handler = ErrConfigHandler(None, {}, False, Mock())
80 | |         handler.parsers
   | |_______________________^
   |

PT012 `pytest.raises()` block should contain a single simple statement
   --> setuptools/tests/test_build_meta.py:957:5
    |
955 |       setuppy = "import sys; sys.exit('some error')"
956 |       (tmp_path / "setup.py").write_text(setuppy, encoding="utf-8")
957 | /     with pytest.raises(SystemExit, match="some error"):
958 | |         backend = BuildBackend(backend_name="setuptools.build_meta")
959 | |         backend.get_requires_for_build_wheel()
    | |______________________________________________^
    |

PT012 `pytest.raises()` block should contain a single simple statement
    --> setuptools/tests/test_egg_info.py:1291:9
     |
1289 |           cmd = dist.get_command_obj("egg_info")
1290 |           expected_msg = r"(Invalid object reference|Problems to parse)"
1291 | /         with pytest.raises((errors.OptionError, ValueError), match=expected_msg) as ex:
1292 | |             write_entries(cmd, "entry_points", "entry_points.txt")
1293 | |             assert "ensure entry-point follows the spec" in ex.value.args[0]
1294 | |             assert "invalid-identifier" in str(ex.value)
     | |________________________________________________________^
1295 |
1296 |       def test_valid_entry_point(self, tmpdir_cwd, env):
     |

Found 3 errors.

Avasam Feb 18, 2026

Pretty much agreed with your entire answer.

Setuptools just removed a ton of code (and tests) with the removal of pkg_resources and dry_run. So it's possible that a handful of tests we found inconvenient to change for PT012 are now just gone. Either way, I'm not against including it by default.

I just ran ruff with TC004 on https://github.com/Toufool/AutoSplit/ (the project I previously saw false-positives in) and can confirm I'm no longer getting false-positives.

Salamandar Feb 21, 2026

I would remove EXE001, because I put shebangs on all files. Shebangs are commonly used to detect the type of the file, even if they are not executable.

raoulcollenteur Feb 24, 2026

We would deselect UP031 because it interferes with using %s string formatting for our logging messages with the standard python logging lib. Not sure about the RET504 either because it has no performance improvements and might make it less understandable (i.e., with math formulas).

ntBre Feb 24, 2026
Maintainer Author

I don't think UP031 should cause any trouble with the stdlib logging module:

import logging

logger = logging.getLogger(__name__)

logger.error("some text: %s", 1)  # okay

https://play.ruff.rs/f525e02c-dd16-464f-807e-c3c9d9fff7b6

It will only emit a diagnostic if you're using % formatting, which shouldn't be necessary in a logging call and would also emit logging-percent-format (G002).

But I can see your point about RET504!

ntBre · 2026-02-10T17:42:28Z

ntBre
Feb 10, 2026
Maintainer Author

Respond to this comment with any rules excluded from this list that you think should be enabled by default

3 replies

Avasam Feb 12, 2026

Based of the projects I publicly actively maintain:

I wanna say I (isort), but I'm sure there's reasons not to (like how it likely requires some level of configuration for most projects, and you may not want Ruff to conflict with an existing project import sorter out of the box)
single-line-implicit-string-concatenation (ISC001)
In my personal experience, even fans of multiline implicit string concatenation don't implicitly concatenate single-lines unless by mistake
blanket-noqa (PGH004)
Pairs well with RUF100+RUF101
Note: I do also think not including PGH003 is the correct choice as that's often better handled by the respective type-checking tool
no-explicit-stacklevel (B028)
I would say unnecessary-paren-on-raise-exception (RSE102) if it was erring on the side of false-negatives instead of false-positives

ntBre Feb 18, 2026
Maintainer Author

Thank you for these suggestions too!

I001 is in the current set, just not I002 since it requires some configuration.

It looks like I categorized the other rules here as being on the pedantic/restrictive side of stylistic lints. I don't feel too strongly about that, although given the size of current set I might go ahead and leave them out for now. I'll keep them in mind, though!

Avasam Feb 18, 2026

Edit: I got confused and read ISC001 in your answer above. I edited this post to remove an incorrect comment.

The only other one in here I'd like to make an argument for, is B028 which is something most people won't even be aware until encountering this rule, and improves warning traces for consumers of that code.

These are just suggestions and I personally start from ALL anyway. Good to keep in mind for later indeed.

hauntsaninja · 2026-02-19T07:01:56Z

hauntsaninja
Feb 19, 2026

Bit of a lazy post, but this is approximately the config we use at work:

Config:

Details

select = [
    "E", "F", "W", "B", "C4", "PIE", "NPY", "PLE", "I",
    # grab bag of random things
    "DTZ003", "DTZ004",
    "G010",
    "PLW0120", "PLW0129", "PLW0211", "PLW0711", "PLW1509", "PLW2101",
    "SIM101", "SIM110", "SIM201", "SIM202", "SIM210", "SIM211", "SIM222", "SIM223",
    "S506",
    "RET501", "RET502",
    "RUF006", "RUF007", "RUF008", "RUF013", "RUF016", "RUF017", "RUF030", "RUF055", "RUF061",
    "RUF102", "RUF200",
    "COM818", "COM819",
    "PYI016", "PYI018", "PYI025", "PYI030",
    "PERF102",
    "UP001", "UP003", "UP004", "UP006", "UP007", "UP028", "UP034", "UP045",
    "FURB132", "FURB148", "FURB162", "FURB163", "FURB171", "FURB181", "FURB192",
    "ISC004",
    "ASYNC251",
    "TID251",
    "PT008", "PT012", "PT010", "PT014",
    "TC005",
]
ignore = [
    "E2",     # leave it to black
    "E3",     # leave it to black
    "E402",   # people usually know what they're doing
    "E501",   # line too long. black does a good enough job
    "E701",   # multiple statements on one line. black does a good enough job
    "E711",   # comparison to None is commonly used with SQLAlchemy
    "E731",   # lambda expression assignments. these are nice sometimes
    "E741",   # variable names like "l". this isn't a huge problem
    "B011",   # assert false. we don't use python -O
    "B903",   # interesting, but pretty opinionated, maybe worth it if it gains an autofix
    "C408",   # we often use dict with keyword args for readability reasons
    "C409",   # https://github.com/astral-sh/ruff/issues/12912
    "C419",   # https://github.com/astral-sh/ruff/issues/10838
    "C420",   # interesting, but i think reads a little worse to most folks. fromkeys predates dict comprehensions
    "UP035",  # not necessary
    "NPY002", # useful in theory, but way too many existing hits in practice
    "PIE790", # there's nothing wrong with pass
    "SIM108",  # not convinced of the value
    "ASYNC109",  # not convinced of the value
    "ASYNC230",  # this is very annoying and often slower
]

I see a few ones you're suggesting that we explicitly disable, and vice versa

1 reply

Avasam Feb 19, 2026

@hauntsaninja sidenote, for C408, you may consider https://docs.astral.sh/ruff/settings/#lint_flake8-comprehensions_allow-dict-calls-with-keyword-arguments

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