Lesson 3 — Classes & objects

Objects

A class is a blueprint that bundles data and behaviour together. init runs when you create an object and stores its data on self. Other methods also take self as their first parameter, so they can read that data, like self.name.

class Dog:
    def __init__(self, name):
        self.name = name
    def bark(self):
        return self.name + " says woof"

Why it matters: classes let you model real things — users, orders, shapes — with the data and the actions in one place.