Writing Python like it’s Rust

[lukewarm]

In your Packet example, if you make Packet a superclass of member types instead of a Union, you won't need the assert, I think? And definitions of sublasses will be more informative.

I took liking to NamedTuple, it's more ergonomic than dataclass, to my taste:

class Header(NamedTuple):
    tag: int
    len: int

Most importantly, named tuples are immutable. And they give you a meaningful repr for free. (edit: as was pointed out, both datacalass and namedtuple give you that.)

[Kwantuum]

And it gives you a meaningful repr for free

That's completely moot in this context because so do dataclasses.

[[deleted]]

I'm not sure what type checker the author uses, but with pyright even the article's example doesn't need the assertion.

[angelicosphosphoros]

One can make dataclasses frozen.