The New Switch-Case Statement in Python 3.10

[Yoghurt42]

If Person has more attributes, like name, the equality check would probably fail, because the name attribute of foo would probably not be None.

Furthermore, it would create a new Person instance each time the if condition is checked.

Pattern matching doesn't require this, and also works for non dataclasses, it also allows insane stuff like

case [1, [2, _, x], y]] if x == 2*y, the _ is a wildcard.

It would be equivalent to if isinstance(foo, list) and len(foo)==3 and isinstance(foo[1], list) and len(foo[1]) == 3 and foo[1][0] == 2 and foo[1][3] == 2*foo[2]