To your last point, check out Dataclasses[1].

    @dataclass
    class Foo:
        arg1: str
        arg2: int
        arg3: int = 5  # default value

I use them a lot in my 3.7+ projects. It helps reduce the boilerplate for typical classes. (Where for me, typical classes are a 1:1 mapping of inputs to attributes)

And if you need to compute some values at object initialization, then they have a __post_init__() hook you can use [2].

[1] https://docs.python.org/3/library/dataclasses.html [2] https://docs.python.org/3/library/dataclasses.html#post-init...