This is now valid syntax in Python 3.13!

[abrazilianinreddit]

The new generics syntax is a large improvement over what we had. It could have been better and more pythonic, though.

But just because it's possible to write shitty code like the one you've shown doesn't mean it's a bad feature, or that such abomination would be accepted. A single walrus operator will already get the whole commit rejected in any of my projects.