Dataclasses do care about type hints in some cases, for example when determining what counts as a field.

    @dataclass
    class A:
        a: int = 0
        b = 1

    >>> A(a=1, b=2)
    TypeError: __init__() got an unexpected keyword argument 'b'

The idea with type hints in Python though is that they’re meant to be checked using some static analysis tool like mypy/pyright/etc. The runtime behavior for the most part remains unchanged in the sense that the Python interpreter won’t enforce the types in cases such as the one you’ve provided.

The only exceptions I can think of is https://docs.python.org/3/library/typing.html#typing.ClassVa...