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Get Started Now!A class defined inside another class is known as an inner class in Python. Sometimes inner class is also called nested class. If the inner class is instantiated, the object of inner class can also be used by the parent class. Object of inner class becomes one of the attributes of the outer class. Inner class automatically inherits the attributes of the outer class without formally establishing inheritance.
Syntax
An inner class lets you group classes. One of the advantages of nesting classes is that it becomes easy to understand which classes are related. The inner class has a local scope. It acts as one of the attributes of the outer class.
Example
In the following code, we have student as the outer class and subjects as the inner class. The __init__() constructor of student initializes name attribute and an instance of subjects class. On the other hand, the constructor of inner subjects class initializes two instance variables sub1, sub2.
A show() method of outer class calls the method of inner class with the object that has been instantiated.
When you execute this code, it will produce the following output −
Name: Ashish Subjects: Phy Che
It is quite possible to declare an object of outer class independently, and make it call its own display() method.
It will list out the subjects.
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