RUF009: False positives in case of immutable objects #4091
Description
I'd argue the following code is ok, as all default parameters are immutable.
import datetime as dt
from dataclasses import dataclass
from pathlib import Path
MyId = int
@dataclass
class Example:
timedelta: dt.datetime = dt.timedelta(hours=1)
date: dt.date = dt.date(2042, 1, 1)
id: MyId = MyId(5)
path: Path = Path()
e = Example()ruff is not happy though:
ruff009.py:9:30: RUF009 Do not perform function call `dt.timedelta` in dataclass defaults
ruff009.py:11:21: RUF009 Do not perform function call `dt.date` in dataclass defaults
ruff009.py:13:16: RUF009 Do not perform function call `MyId` in dataclass defaults
ruff009.py:15:18: RUF009 Do not perform function call `Path` in dataclass defaults
Isn't there a similar case for default values of method parameters? I think this rule had a list of (at least some) allowed calls.
EDIT: Here is the list: https://github.com/charliermarsh/ruff/blob/main/crates/ruff/src/rules/flake8_bugbear/rules/function_call_argument_default.rs