How to create Haskell-like sum types in Python?

Enum or a Union is the closest thing to a tagged union or sum type in Python

Enum

from enum import Enum

class Owner(Enum):
     Me = 1
     You = 2

Union

https://docs.python.org/3/library/typing.html#typing.Union

import typing

class Me:
    pass
class You:
    pass

owner: typing.Union[Me, You] = Me