If you’re just starting out with object-oriented programming in Python, the terms class and object might sound intimidating.
But don’t worry this step-by-step guide will walk you through creating your first Python class and object with clear examples, explanations, and analogies.
By the end of this short tutorial, you’ll understand:
- What a class and object really are
- How to define a class
- How to create objects (instances)
- How to access and use attributes
- And how this all fits together in real programs
Let’s begin with a simple idea.
🧠 What Is a Class?
A class is a blueprint for creating objects.
Think of it like a cookie cutter it defines the shape, but not the actual cookie.
✅ Step 1: Define a Class
Let’s say we want to model a Dog.
class Dog:
passHere, Dog is the class name.
We’ve used pass as a placeholder (so the code doesn’t break while empty).
✅ Step 2: Add a Constructor (__init__)
We want every dog to have a name and breed.
Let’s add a constructor to initialize that data.
class Dog:
def __init__(self, name, breed):
self.name = name
self.breed = breed🔍 What’s going on here?
__init__()is called automatically when you create a new dogself.nameandself.breedare attributes tied to each dog objectselfrefers to the current object (like saying “my own name is…”)
✅ Step 3: Create an Object
Now that we have a class, let’s make a real dog:
my_dog = Dog("Bruno", "Labrador")🔍 Now you have an object named my_dog:
my_dog.name→"Bruno"my_dog.breed→"Labrador"
✅ Step 4: Add a Method (Behavior)
Let’s give dogs the ability to bark:
class Dog:
def __init__(self, name, breed):
self.name = name
self.breed = breed
def bark(self):
print(f"{self.name} says: Woof!")Now we can do:
my_dog = Dog("Bruno", "Labrador")
my_dog.bark()Output:
Bruno says: Woof!
📋 Full Working Example
class Dog:
def __init__(self, name, breed):
self.name = name
self.breed = breed
def bark(self):
print(f"{self.name} says: Woof!")
my_dog = Dog("Bruno", "Labrador")
print("Dog’s name:", my_dog.name)
print("Breed:", my_dog.breed)
my_dog.bark()🔁 Why Use Classes and Objects?
They let you:
- Group data and behavior into one place
- Create multiple reusable instances
- Write cleaner and more modular code