false positive on PLC2801 "unnecessary dunder... for __setattr__"

[dimbleby]

ruff 0.1.13

from dataclasses import dataclass, field


@dataclass(frozen=True)
class Foo:
    a: int
    b: int
    c: int = field(init=False)

    def __post_init__(self) -> None:
        object.__setattr__(self, "c", self.a + self.b)

the __setattr__ trick is necessary because the dataclass is frozen, but:

PLC2801 Unnecessary dunder call to `__setattr__`. Mutate attribute directly or use setattr built-in function.

via #9166 presumably

looks like y'all went round this once already at #4752...

[trag1c]

IMO all instances of object dunder calls should be allowed considering they're so common (would likely prevent a third round of this issue :)).

[charliermarsh]

I believe this is fixed on main, and in v0.1.14 https://play.ruff.rs/73935842-d2c6-4b42-b5de-545c9a5be633.