Lesson 14: Object-Oriented Programming (OOP) – Polymorphism

Jun 19, 2023 | Uncategorized | 0 comments

Home 9 Uncategorized 9 Lesson 14: Object-Oriented Programming (OOP) – Polymorphism

Polymorphism is a fundamental concept in object-oriented programming that allows objects of different classes to be treated as objects of a common base class. It enables code flexibility and reusability by providing a consistent interface for interacting with different objects, regardless of their specific implementations.

Let’s explore polymorphism in Python:

# Polymorphism
class Shape:
    def calculate_area(self):
        pass

class Rectangle(Shape):
    def __init__(self, width, height):
        self.width = width
        self.height = height

    def calculate_area(self):
        return self.width * self.height

class Circle(Shape):
    def __init__(self, radius):
        self.radius = radius

    def calculate_area(self):
        return 3.14 * self.radius ** 2

# Creating objects
rectangle = Rectangle(5, 3)
circle = Circle(7)

# Calculating areas
print("Rectangle area:", rectangle.calculate_area())
print("Circle area:", circle.calculate_area())

Explanation:

  • We define a base class Shape with a method calculate_area().
  • We define two derived classes, Rectangle and Circle, that inherit from the Shape class and override the calculate_area() method with their specific implementations.
  • We create objects of both classes, rectangle and circle.
  • We call the calculate_area() method on both objects, which invokes the appropriate method based on the object’s class.

Polymorphism allows us to treat the objects uniformly by using a common interface (calculate_area() method in this example), even though they have different implementations.

Now it’s time for a practical task:

Task 14:

Create a class called Animal with a method make_sound() that prints a generic sound. Create two derived classes, Cat and Dog, that inherit from Animal. Override the make_sound() method in each derived class to print the specific sound of a cat and a dog, respectively. Create objects of both derived classes and call the make_sound() method on each object.

Once you’ve completed the task, you can proceed to the next lesson.

Join The FFF Newsletter

Future Flow Forecast

Future Flow Forecast

Joinย the number one AI newsletter and learn how to be at the forefront of the latest discoveries. This is your "dotcom bubble" chance!

You have Successfully Subscribed!