dunder

class Monster:

    def __init__(self,health,energy):
        self.health = health
        self.energy = energy

    def __len__(self):
        return self.health

    def __abs__(self):
        return self.energy

    def __call__(self):
        print('The monster was called')

    def __add__(self,other):
        return self.health + other

    def __str__(self):
        return f'A monster with health {self.health} and energy {self.energy}'

    # methods
    def attack(self,amount):
        print('The monster has attacked!')
        print(f'{amount} damage was dealt')
        monster.energy -= 20
        print(self.energy)

    def move(self,speed):
        print('The monster has moved')
        print(f'It has a speed of {speed}')

monster1 = Monster(10,20)
print(str(monster1))
print(monster1)