Arithmetic operator overloading in Python - Mini Project: Build & Apply

Arithmetic Operator Overloading

📖 Scenario: Imagine you are creating a simple program to handle points on a 2D plane. You want to add two points together using the + operator, just like adding numbers.

🎯 Goal: You will create a class called Point that stores x and y coordinates. Then, you will make the + operator work to add two points by adding their x and y values.

📋 What You'll Learn

Create a class called Point with x and y attributes

Add a method to overload the + operator to add two Point objects

Create two Point objects with given coordinates

Add the two points using the + operator and print the result

💡 Why This Matters

🌍 Real World

Operator overloading helps make custom objects behave like built-in types, making code easier to read and write, such as adding points, vectors, or complex numbers.

💼 Career

Understanding operator overloading is useful in software development roles that involve creating custom data types, game development, graphics programming, and scientific computing.

1

Create the Point class with x and y attributes

Write a class called Point with an __init__ method that takes x and y as parameters and stores them as attributes.

Python

# Your code here

Need a hint?

Use def __init__(self, x, y): to create the constructor and assign x and y to self.x and self.y.

2

Create two Point objects with coordinates (3, 4) and (5, 7)

Create two variables called p1 and p2 that are Point objects with coordinates (3, 4) and (5, 7) respectively.

Python

class Point:
    def __init__(self, x, y):
        self.x = x
        self.y = y

# Your code here

Need a hint?

Use p1 = Point(3, 4) and p2 = Point(5, 7) to create the points.

3

Add a method to overload the + operator to add two Point objects

Inside the Point class, add a method called __add__ that takes self and other as parameters. It should return a new Point with x as the sum of self.x and other.x, and y as the sum of self.y and other.y.

Python

class Point:
    def __init__(self, x, y):
        self.x = x
        self.y = y

    # Your code here

p1 = Point(3, 4)
p2 = Point(5, 7)

Need a hint?

Define def __add__(self, other): and return a new Point with summed x and y.

4

Add the two points using + and print the result

Create a variable called p3 that is the sum of p1 and p2 using the + operator. Then, print the x and y values of p3 separated by a space using print(p3.x, p3.y).

Python

class Point:
    def __init__(self, x, y):
        self.x = x
        self.y = y

    def __add__(self, other):
        return Point(self.x + other.x, self.y + other.y)

p1 = Point(3, 4)
p2 = Point(5, 7)

# Your code here

Need a hint?

Use p3 = p1 + p2 and then print(p3.x, p3.y) to show the result.