[Python] How to get the generic type at runtime

In this snippet below, I want to get the inferred type of the generic at runtime to validate the data. How can I make the get_type so that I can get the type correctly?

class Test[T]:
data: Optional[T]

def __init__(self, data: Optional[T]):
get_type(T)

if __name__ == "__main__":
Test[int](data=1)
Test[str](data=None)
Test[None](data=None)


I tried doing the suggestions in How to access the type arguments of typing.Generic?, but it returns either T, T~, or an empty tuple . Also, __orig_bases__ does not seem to exist any more in 3.13.

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