Class in Python

how to track the HP of all characters?

It's better to make each character has its own HP. This is where Class comes in handy.

class Monster():
    hp = 100
    mp = 10

    def damage(self, attack):
        self.hp = self.hp - attack

monster1 = Monster()
monster1.damage(120)

monster2 = Monster()
monster2.damage(90)