Why should we use class?

All objects in Python contain persistent values or state. A str contains characters, an int or float contain numeric values, a list or set contain a collection of references to other objects. These are all classes.

Using def to define a function, creates a way to operate on objects, that is, to affect them or create other classes based on them.

A class is defined if a new object is needed to store state in a way not possible by the built-in classes. The class methods allows for controlling the specific ways the state of a class instance may be modified. All of the state and methods of a class are considered to be attributes of the class.

A user on a website is a common example of a class where the state of the user contains user information, privileges, activity history, etc. plus the methods to modifying the state. Additionally, these class attributes may references to other class instances, and so on.

Post back if you have more questions. Good luck!!