[Python] Is there only way to use TypeVar?

[ruoruoniao]

Feature Request

Now in fory annotation we only have annotations like Int8 = TypeVar('Int8', bound=int), is there some other way to solve the warning when using dataclass_json:

UserWarning: Unknown type ~Float64 at Vector4d.x: ~Float64 It's advised to pass the correct marshmallow type to `mm_field`.

Also, IDE will unhappy when we use TypeVar as a property annotation...

Is your feature request related to a problem? Please describe

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