class Character:
    def __init__(self, name, health):
        self.name = name
        self.health = health

hero = Character("Aria", 100)
villain = Character("Grim", 80)
print(hero.name, hero.health)
print(villain.name, villain.health)

class Character: starts the definition. Class names use CapitalisedWords, unlike variables and functions.
__init__ (two underscores each side) is a special method Python runs automatically whenever a new object is made. Its job is to set up the object's data.
self is the object being set up. self.name = name stores the name on the object, as an attribute.
Character("Aria", 100) makes a new object, or instance, of the class. Python creates it, calls __init__ with it as self and the other arguments, and gives it back.

hero and villain are two separate objects made from the same blueprint, each with its own attributes.