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I believe this is the example where dataclasses could have supported __slots__ better with a metaclass?

Thanks for working on dataclasses :) - as I said, it's my #1 new feature in Python.

Maybe that would have worked better with a metaclass.

But still, I think not using a metaclass is the more flexible design. Maybe I'll add the "add_slots" behavior into the @dataclass decorator in 3.10, even though it would need to return a new class. At least it could be well documented, and I doubt it's a concern for most people.

> Thanks for working on dataclasses :) - as I said, it's my #1 new feature in Python.

I'm offended! I also wrote f-strings, but maybe that's not considered new anymore. In any event, you're welcome!

Maybe the __slots__ discussion is not really that important - it's just convenience, and the regular old method of adding slots still works. So it's a minor thing.

I have diligently converted to f-strings but it doesn't give me new expressibility like I feel dataclasses do, just convenience :)

fstrings and datclasses changed my life. thank you :)

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