Since 3.10 now has slots=True argument for @dataclass decorator, we need to support it, since #10864 is merged.
Failing case right now:
from dataclasses import dataclass
@dataclass(slots=True)
class Some:
x: int
def __init__(self, x: int) -> None:
self.x = x # ok
self.y = 1 # should be an error, but `mypy` is ok
# Traceback (most recent call last):
# ...
# AttributeError: 'Some' object has no attribute 'y'Compare it with regular class, which works fine:
class Some:
__slots__ = ('x',)
def __init__(self, x: int) -> None:
self.x = x # ok
self.y = 1 # E: Trying to assign name "y" that is not in "__slots__" of type "ex.Some"Docs: https://docs.python.org/3/library/dataclasses.html#dataclasses.dataclass
Refs #11463
Since
3.10now hasslots=Trueargument for@dataclassdecorator, we need to support it, since #10864 is merged.Failing case right now:
Compare it with regular class, which works fine:
Docs: https://docs.python.org/3/library/dataclasses.html#dataclasses.dataclass
Refs #11463