Super() and polymorphism ( Python )

class User():
    def __init__(self, email):
        self.email = email

    def sign_in(self):
        print("logged in...")


class Wizard(User):
    def __init__(self, name, power, email):
        super().__init__(email)
        self.name = name
        self.power = power

    def attack(self):
        print(f"{self.name} attacking with power of {self.power}.")


class Archer(User):
    def __init__(self, name, num_arrows):
        self.name = name
        self.num_arrows = num_arrows

    def attack(self):
        print(f"{self.name} attacking with arrows: arrows left - {self.num_arrows}.")


wizard1 = Wizard("Merlin", 50, "wizard@abv.bg")
archer1 = Archer("Robin", 100)
wizard1.sign_in()
archer1.sign_in()
wizard1.attack()
archer1.attack()
print(wizard1.email)
print(isinstance(User, object)) # True
print(isinstance(wizard1, object)) # True