[issue45384] Accept Final as indicating ClassVar for dataclass

[Gregory Beauregard]

Gregory Beauregard <greg at greg.red> added the comment:

Hi Michael,

Thanks for taking the time to look into this.

I don't feel strongly enough about following the existing PEP wording to desire creating a situation where instance vars can't be marked Final if we can instead make a workaround with ClassVar[Final[...]]. Plus, I can appreciate the argument that dataclasses are their own thing that should be treated specially in the PEP.

If you know what's involved in formally proposing and enacting a PEP amendment I can get behind that.

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<https://bugs.python.org/issue45384>
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