Re: [Python-Dev] Second post: PEP 557, Data Classes

2017年11月26日 13:39:06 -0800 

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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