Explore Python Nested Classes: What They Are and Why You Need Them

Elevate your Python coding using nested classes. Explore their basics, benefits, and practical applications. Uncover the power of nested classes for better code organization and efficiency. Dive into a coding experience that empowers your projects from the ground up.

In this blog, we’ll dive into the world of Python nested classes. Wondering what they are and why they matter? If you’ve ever tried putting a class inside another, that’s a nested class! Learn how it helps organize related tasks in Python.

To make a nested class, you just create a new class inside another one. This is handy for grouping similar tasks and keeping details hidden from outside eyes.

The cool part? A nested class can use the things (attributes and methods) of the main class. This is super useful for certain ways of building your code.

Join us to understand the ins and outs of Python nested classes—making your coding journey easier

A nested class has access to the attributes and methods of its outer class, which can be useful for implementing certain design patterns.

There are several use cases for nested classes in Python, including:

Grouping related functionality:

Nested classes can be used to group together related functionality within a class. This can make the code more organized and easier to read.

Encapsulation:

Nested classes can be used to hide implementation details from the outside world. This can be useful for creating cleaner and more modular code.

Implementation of design patterns:

Some design patterns, such as the Factory Pattern, make use of nested classes to encapsulate the creation of objects.

Access to outer class attributes and methods:

Nested classes have access to the attributes and methods of the outer class, which can be useful for implementing certain functionality.

Python Nested Class Video Tutorial :

In this video, let’s dive into Python nested classes with a detailed step-by-step implementation.

Let’s start with creating a class A inside which we will be adding a init block of code too.

class A:
    def __init__(self, name):
        self.name = name
         

Now create a method in class A which will have a print method

def show(self):
    print("I am outer class", self.name)

It’s time to create our actual nested class

Create class B

class B:

class A:
    def __init__(self, name):
        self.name = name
    class B:
        def show(self):
            print("I am inner class")

And now let’s try to run the code

a1 = A('Abhi')
a1.show()

output :

I am outer class Abhi

And now what about class B i.e., our nested class how can we access it ???

Create a object for b in init method as shown below and then access the method show of class B.

class A:
    def __init__(self, name):
        self.name = name
        self.b = self.B()
        self.b.show()
         

And now try to run this code you will see both the show methods get printed.

output :

I am inner class
I am outer class Abhi

And here you might be surprised to see class B show method is printed first rather than class A because in class A we have init block of code which is executed first rather than any other method.

Nested class has access to all the attributes and methods of the outer class, but the outer class does not have access to the attributes and methods of the nested class.

Master Python nested classes effortlessly! Our in-depth video tutorial guides you through seamless implementation. Elevate your coding skills and optimize your projects with this essential knowledge. Watch now and delve into the power of Python nested classes for a more organized and efficient code structure.