[Python-Dev] Second post: PEP 557, Data Classes (original) (raw)

Eric V. Smith eric at trueblade.com
Sun Nov 26 15:22:56 EST 2017


On 11/26/2017 1:04 PM, Brett Cannon wrote:

The only open issues I know of are: - Should object comparison require an exact match on the type? https://github.com/ericvsmith/dataclasses/issues/51

I say don't require the type comparison for duck typing purposes.

The problem with that is that you end up with cases like this, which I don't think we want:

@dataclass class Point: x: int y: int

@dataclass class Point3d: x: int y: int z: int

assert Point(1, 2) == Point3d(1, 2, 3)

Eric.



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