Features

• Allows __init__.py files that consist only of imports, #3486
• Adds --max-conditions option, #3493
• Adds --known-enum-bases option to support custom enum-like base classes, #3513

Misc

• Adds custom Sphinx directive .. plugincodes for violation rendering, #1318
• Adds violation classes filter for docs rendering, #3490

New Contributors

• @makridenko made their first contribution in #3495
• @Evgenmater made their first contribution in #3499

Full Changelog: 1.3.0...1.4.0

Features

• Adds more names to WPS110: spam, ham, tmp, temp, arr

Bugfixes

• Fixes WPS243 to use number of statements in finally body
  instead of a number of lines, #3458

Main changes

Due to PEP-695, it's now allowed
to use [] in decorators only for python3.12+.

@MyClassDecorator[T, V]
def some_function(): ...

Features

• Adds WPS243: forbids complex finally bodies, #3458
• Adds WPS478: forbids using non strict slice operations, #1011
• Adds WPS479: forbids using multiline fstrings, #3405
• Adds WPS480: forbids using comments inside formatted string, #3404

Bugfixes

• Removes unnecessary WPS604 and WPS614 rules from the noqa.py, #3420
• Fixes WPS115 false-positive on StrEnum, IntEnum, IntFlag attributes, #3381
• Fixes WPS432, now it ignores magic numbers in Literal, #3397
• Fixes WPS466 for generic type specifications MyClassDecorator[T], #3417
• Fixes WPS212 to ignore nested classes and functions
  when counting return statements, #3413
• Improves WPS349 highlighting, #3437

New Contributors

• @LordGvozd made their first contribution in #3362
• @NikitaSemenovAiforia made their first contribution in #3382
• @wjqsm made their first contribution in #3403
• @mkaraev made their first contribution in #3411
• @joscha made their first contribution in #3421
• @MIXgleb made their first contribution in #3423
• @dgtrv made their first contribution in #3431
• @alexeev-prog made their first contribution in #3461

Full Changelog: 1.1.0...1.2.0

Command line utility

This version introduces wps CLI tool.
wps explain <code> command can be used to access WPS
violation docs (same as on website) but without any internet access.

Example output:

Features

• Adds WPS476: forbids to use await expressions in for loops, #1600
• Adds WPS477: forbids TypeVarTuple after a TypeVar with a default, #3265

Bugfixes

• Fixes WPS115 false-positive on Enum attributes, #3238
• Removes duplicated WPS312, #3239
• Fixes WPS432, now it shows literal num, #1402
• Fixes WPS226, now it points to the first string literal occurrence, #3267
• Fixes WPS605 false-positive on @staticmethod, #3292
• Fixes _SELF name not to trigger WPS117, #3310
• Fixes WPS221 being too strict with f-strings, #3350

Ruff

This release introduces the new main concept: ruff compatibility.

Now WPS is the only flake8 plugin that is installed.
Other things are done by ruff.
It is faster, it has autofixing, there are lots of rules.
Basically, this way WPS just gain lots
of new rule and plugins almost for free.
It is now stricter than ever! WPS now officially supports
ALL ruff existing rules. This means that there are no conflicts
between two linters.

To run WPS and ruff together, use:

ruff format && ruff check && flake8 --select=WPS .

You can copy our configuration from pyproject.toml (for ruff) and setup.cfg (for flake8).

Black

WPS can now also be used with black with default configuration.
However, we recommend using ruff format instead.

Speed

WPS got a lot faster! Because:

• We removed a lot of flake8 plugins
• We removed a lot of rules covered by ruff

Running 0.19.2 (previous version) on https://github.com/dry-python/returns

» time flake8 .
flake8 .  20.63s user 2.47s system 469% cpu 4.919 total

The same on 1.0.0:

» time flake8 .
flake8 .  8.56s user 0.54s system 898% cpu 1.013 total

Which is 2.4x times faster!

Integrations

We also significantly improved all the integrations!
WPS can now be used as first-class pre-commit hook with:

repos:
- repo: https://github.com/wemake-services/wemake-python-styleguide
  rev: 1.0.0
  hooks:
    - id: wemake-python-styleguide

Our GitHub Action also got a lot of new options and fixes.

Removals

• Breaking: Drops python3.9 support
• Breaking: Drops nitpick support
• Breaking: Drops flake8-commas, flake8-isort,
  flake8-debugger, flake8-string-format, flake8-quotes,
  flake8-comprehensions, flake8-bugbear, flake8-docstrings,
  flake8-eradicate, flake8-bandit, flake8-broken-line,
  flake8-rst-docstrings, pep8-naming
  support, use ruff format and ruff check instead
• Breaking: Drops darglint support, because it is unmaintained
• Breaking: Removes WPS113, because is covered by pylint linter
• Breaking: Removes WPS119, because is covered by pylint linter
• Breaking: Removes WPS125, because it is covered by ruff linter
• Breaking: Removes WPS302, because it is covered by ruff formatter
• Breaking: Removes WPS304, because it is covered by ruff formatter
• Breaking: Removes WPS305, because it is covered by ruff formatter
• Breaking: Removes WPS306, because it is covered by ruff formatter
• Breaking: Removes WPS309, because it is covered by ruff formatter
• Breaking: Removes WPS310, because it is covered by ruff formatter
• Breaking: Removes WPS313, because it is covered by ruff formatter
• Breaking: Removes WPS315, because it is covered by ruff formatter
• Breaking: Removes WPS316, because it is covered by ruff linter
• Breaking: Removes WPS317, because it is covered by ruff formatter
• Breaking: Removes WPS318, because it is covered by ruff formatter
• Breaking: Removes WPS319, because it is covered by ruff formatter
• Breaking: Removes WPS320, because it is covered by ruff formatter
• Breaking: Removes WPS323, because it is covered by ruff formatter
• Breaking: Removes WPS326, because it is covered by ruff linter
• Breaking: Removes WPS329, because it is covered by ruff linter
• Breaking: Removes WPS331, because it is covered by ruff linter
• Breaking: Removes WPS333, because is covered by pylint linter
• Breaking: Removes WPS337, because it is covered by ruff formatter
• Breaking: Removes WPS340, because it is covered by ruff formatter
• Breaking: Removes WPS341, because it is covered by ruff formatter
• Breaking: Removes WPS343, because it is covered by ruff formatter
• Breaking: Removes WPS348, because it conflicts with ruff formatter
• Breaking: Removes WPS351, because it is covered by ruff linter
• Breaking: Removes WPS352, because it is covered by ruff formatter
• Breaking: Removes WPS355, because it is covered by ruff formatter
• Breaking: Removes WPS360, because it is covered by ruff formatter
• Breaking: Removes WPS361, because it is covered by ruff formatter
• Breaking: Removes WPS415, because is covered by ruff linter
• Breaking: Removes WPS417, because is covered by ruff linter
• Breaking: Removes WPS419, because is covered by ruff linter
• Breaking: Removes WPS423, because is covered by ruff linter
• Breaking: Removes WPS424, because is covered by ruff linter
• Breaking: Removes WPS425, because is covered by ruff linter
• Breaking: Removes WPS428, because is covered by ruff linter
• Breaking: Removes WPS433, because is covered by pylint linter
• Breaking: Removes WPS434, because is covered by pylint linter
• Breaking: Removes WPS436, because is covered by pylint linter
• Breaking: Removes WPS437, because is covered by ruff linter
• Breaking: Removes WPS440, because
  it was buggy and is covered by mypy, #3209
• Breaking: Removes WPS442, because
  it was buggy and is covered by mypy, #3209
• Breaking: Removes WPS450, because is covered by pylint linter
• Breaking: Removes WPS452, because is covered by ruff linter
• Breaking: Removes WPS454, because is covered by ruff linter
• Breaking: Removes WPS456, because is covered by ruff linter
• Breaking: Removes WPS465, because | is now heavily used by typing
• Breaking: Removes WPS467, because is covered by pylint linter
• Breaking: Removes WPS502, because is covered by ruff linter
• Breaking: Removes WPS503, because is covered by ruff linter
• Breaking: Removes WPS507, because is covered by pylint linter
• Breaking: Removes WPS508, because is covered by ruff linter
• Breaking: Removes WPS510, because is covered by pylint linter
• Breaking: Removes WPS514, because is covered by pylint linter
• Breaking: Removes WPS528, because is covered by pylint linter
• Breaking: Removes WPS525, because is covered by ruff linter
• Breaking: Removes WPS526, because is covered by ruff linter
• Breaking: Removes WPS521, because is covered by ruff linter
• Breaking: Removes WPS609, because is covered by pylint linter
• Breaking: Removes --i-control-code setting,
  if you want to disable some violations, just use # noqa or --ignore
  with code that you want to exclude, there's no need
  to create one more way of disabling some specific violations

Features

• Adds official python3.13 support
• Allows any compares in assert statements for WPS520, #3112
• Allows walrus operator (:=) in comprehesions, #3121
• Allows pass in case bodies, #2642
• Allows subclassing builtins in WPS600, when creating an Enum, #2506
• Allows using variables after blocks for WPS441 in assert statements, #2543
• Does not count self, cls, and mcs as arguments
  for WPS211 complexity check anymore, #2394
• Allows underscores (_) with exactly 3 digits after it in WPS303, #3120
• Allows class / instance attribute shadowing
  in @dataclasses for WPS601, #1926
• Allows any number of instance attributes on @dataclasses in WPS230, #2448
• Allows any number of function parameters
  in @overload definitions for WPS211, #1957
• Allows using multiline strings when placed on separate lines, #3056
• Allows using hasattr builtin function, #2228
• Disallows using is not and not in as negated conditions in WPS504, #2617
• Allows all branches in if/elif/else to be negated in WPS504, #2617
• Adds a new rule to forbid lambda assigns to special attributes, #1733
• Adds a new rule to check problematic function params, #1343
• Adds a new rule to detect duplicate conditions in ifs and elifs, #2241
• Adds a new rule to detect duplicate case pattens in match, #3206
• Adds a new rule to find too many match subjects, #3201
• Adds a new rule to detect too many case statements, #3202
• Adds a new rule to find too complex except with too many exceptions
• Adds a new rule to find too many PEP695 type params
• Adds a new rule to find useless ternary expressions, #1706
• Adds a new rule to forbid raise SystemExit, use sys.exit instead, #1786
• Adds a new rule to forbid extra syntax in match ... subjects, #3217
• Adds new --allowed-module-metadata and --forbidden-module-metadata
  configuration options for WPS410, #3060
• Now --allowed-domain-names also affect WPS11
  to allow custom short variable names, #2554
• Adds support to run wemake-python-styleguide as a pre-commit hook, #2588
• GitHub Action can now use cwd: parameter to specify
  where your configuration file is, #2474
• GitHub Action can now use fail_workflow: parameter to not fail
  the workflow even if the check did find any issues
• GitHub Action can now use filter_mode: parameter to specify
  how ReviewDog will filter found violations,
  see https://github.com/reviewdog/reviewdog#filter-mode #2239

Bugfixes

• Fixes WPS217 to allow simple calls in f strings, #3150
• Fixes WPS217 not to raise on empty f strings,
  because ruff check handles that now for us
• Fi...

Bugfixes

• Fixes WrongEmptyLinesCountViolation crash on Callable[..., ...] #2899

This release fixes how ... is used. For example, it is common to define
function stubs / protocols like this:

def some_function(): ...

Now, ... will be excluded from several rules.

Bugfixes

• Fixes TooDeepNestingViolation not to trigger
  on ... in functions and classes
• Fixes StatementHasNoEffectViolation not to trigger
  on ... in functions and classes, when it is the only node

This minor version will be the last release with all the flake8 plugins.
In the future this project will be migrated to be used together with ruff.

Features

• Adds official python3.12 support
• Breaking: drops python3.8 support
• Breaking: Reconsider object required base class exception:
  since class Klass[_Type] must not contain object,
  this rule is change to be the opposite:
  object explicit base class must not be used.
  You can use ruff to change all object-based types to the new style:
  ruff check --select=UP004 --fix .
  https://docs.astral.sh/ruff/rules/useless-object-inheritance/
• Breaking: allow positional-only parameters,
  since it is required by mypy when using Concatenate
• Adds support for naming rules for PEP695 type params
• Due to how f-string are parsed in python3.12 several token-based
  violations are not reported anymore for them:
  WrongMultilineStringViolation, ImplicitRawStringViolation,
  WrongUnicodeEscapeViolation, RawStringNotNeededViolation
• wemake output formatter now respects NO_COLOR=1 option
  to disable text highlighting. See https://no-color.org
• Adds ImportObjectCollisionViolation to detect
  the same objects imported under different aliases
• Adds reveal_locals to the list of forbidden functions
• Updates flake8 to 7.x

Bugfixes

• Fixes ForbiddenInlineIgnoreViolation config parsing. #2590
• Fixes WrongEmptyLinesCountViolation for func definitions with ellipsis. #2847
• Fixes WrongEmptyLinesCountViolation for multiline implicit string concatination. #2787
• Fixes ObjectInBaseClassesListViolation, UnpythonicGetterSetterViolation,
  ImplicitInConditionViolation, RedundantSubscriptViolation,
  TooLongCompareViolation to include better error details
• Fixes TooDeepNestingViolation for TryStar and Match statements
• Fixes TooLongTryBodyViolation and TooManyExceptCasesViolation
  to work for TryStar statements as well
• Fixes UselessNodeViolation to work with TryStar
• Fixes DuplicateExceptionViolation to work with TryStar
• Fixes TryExceptMultipleReturnPathViolation to work with TryStar
• Fixes IncorrectExceptOrderViolation to work with TryStar
• Fixes that MatchStar was not checked in pattern matching name assignments
• Fixes pattern matching support
  in BlockAndLocalOverlapViolation and OuterScopeShadowingViolation

Misc

• Updates multipleflake8-* dependencies
• Fixes multiple typos in docs

Features

• Breaking: drops python3.7 support, because it has almost reached its EOL
• Adds python3.11 support
• Bump flake8 to version 5.x
• Bump flake8-* dependencies to newer versions
• Added ChainedIsViolation #2443
• Added BuggySuperContextViolation #2310

Bugfixes

• Make generic_visit() check script properly handle with statements.
• Allow calling magic methods with the same name as the enclosing method #2381
• Fix WrongEmptyLinesCountViolation false positive #2531
• Fix OpenWithoutContextManagerViolation false positive #2577

Misc

• Replaced flakehell mentions to flakeheaven #2409

Features

• Breaking: drops python3.6 support
• Adds support for pattern matching naming rules, same as other variables
• Adds --show-violation-links option to show links to violation docs
• Adds __init_subclass__ in the beginning of accepted methods
  order as per WPS338 #2411
• Adds WrongEmptyLinesCountViolation to check
  for too many lines in functions and methods definitions #2486

Bugfixes

• Fixes WPS226 false positives on | use in SomeType | AnotherType
  type hints syntax
• Now -1 is not reported to be an overused expression
• Allow __aiter__ to be async iterator
• Adds violation method name to error message of YieldMagicMethodViolation
• Fixes direct docker image invocation #2492

Misc

• Adds full violation codes to docs and BaseViolation.full_code #2409
• Fix documentation mismatch between default setting
  for max-string-usages and enforced rule #2456
• Domain name was changed from wemake-python-stylegui.de
  to wemake-python-styleguide.rtfd.io