Shared via mypy Playground

main.py

# https://peps.python.org/pep-0646/

from typing import Generic, Tuple, List, TypeVarTuple, Unpack



class A:
    ...


class B(A):
    ...


class C(A):
    def __init__(self, value=1):
        self.value = value


Ts = TypeVarTuple('Ts')


class Test(Generic[Unpack[Ts]]):
    def __init__(self, *content: Unpack[Ts]):
        self.content: List[Tuple[Unpack[Ts]]] = [content]

    def call(self, *values: Unpack[Ts]):
        self.content.append(values)


t2: Test[B, C]
t2 = Test(B(), C())
t2.call(B(), C())
t2.call(C(), C())
t2.call(C())

t3: Test[B, C] = Test((C(), C()))