from dataclasses import dataclass


class a_place_on_earth(list): ...


@dataclass
class Dog:
    name: str

    def __del__(self):
        global heaven
        heaven.append(self)


heaven = a_place_on_earth()

if __name__ == "__main__":
    Dog("Fido")
    Dog("Rex")
    Dog("Spot")
    print(heaven)