flake8-ruff
A Flake8 plugin that implements miscellaneous checks from Ruff.
Specifically, this plugin implements checks that are under the RUF category
(the rules that do not have a direct equivalent in Flake8).
Requirements
Python 3.9 and newer is supported.
Installation
Install from PyPI. For example,
pip install flake8-ruff
Then follow the instructions on the Flake8 documentation to enable the plugin.
Checks
RUF010 Use explicit conversion flag
Checks for str(), repr(), and ascii() as explicit conversions within
f-strings.
For example, replace
f"{ascii(foo)}, {repr(bar)}, {str(baz)}"
with
f"{foo!a}, {bar!r}, {baz!s}"
or, often (such as where __str__ and __format__ are equivalent),
f"{foo!a}, {bar!r}, {baz}"
Derived from explicit-f-string-type-conversion (RUF010).
RUF018 Avoid assignment expressions in assert statements
Checks for named assignment expressions in assert statements. When Python is
run with the -O option, the assert statement is ignored, and the assignment
expression is not executed. This can lead to unexpected behavior.
For example, replace
assert (result := foo()) is not None
with
result = foo()
assert result is not None
Derived from assignment-in-assert (RUF018).
RUF020 typing.Never | T is equivalent to T
Checks for typing.Never and typing.NoReturn in union types, which is
redundant.
For example, replace
typing.Never | int | None
with
int | None
Derived from never-union (RUF020).
RUF025 Unnecessary dict comprehension for iterable; use dict.fromkeys instead
Checks for dict comprehensions that create a dictionary from an iterable with a
constant value. Instead, use dict.fromkeys, which is more efficient.
For example, replace
{key: 0 for key in keys}
with
dict.fromkeys(keys, 0)
and
{key: None for key in keys}
with
dict.fromkeys(keys)
Derived from unnecessary-dict-comprehension-for-iterable (RUF025).
1 maintainer
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