I'm happy to see data classes. I think something like this exists in 3.6:

    class Person(typing.NamedTuple):
        name: str
        age: int

But I don't think it supports the __post_init__; however, constructors have no business doing parsing like this anyway, so unless I'm missing something, deriving from `typing.NamedTuple` seems strictly better than `@dataclass` insofar as it seems less likely to be abused.