I've been doing a bit of refresher on Python, learning about the new capabilities added in Python 3.

Tonight, I learned about @singledispatchmethod alongside typehinting.

You can use it wth __init__ on classes. Honestly, there's no reason why that shouldn't be the case since object allocation and initialization are separated in Python. But it's still nice to confirm.

from functools import *

class Foo:
    @singledispatchmethod
    def __init__(self, arg):
        raise NotImplementedError(f"Cannot initialize from {arg}")

    @__init__.register
    def _(self, a: int):
        print(f"{a} is an integer")

    @__init__.register
    def _(self, a: str):
        print(f"{a} is an string")

>>> f = Foo("asdf")
asdf is an string

>>> f2 = Foo(123)
1 is an integer