ing Lec 3: Classes and Ob Classes around him To mind map Classes are created using the keyword class. A class declaration defines a new type that links code and data. This new type is then used to declare objects of that class. Thus, a class is a logical abstraction, but an object has physical existence. A programmer can create many instances of a class. Creating an instance of a class interchangeably. An object is an instance and an instance is an object. is referred to as instantiation. The terms object and instance are often used Every element in a Python program is an object of a class. A number, string, list, dictionary, etc., used in a program is an object of a corresponding built-in class. The followings are class members: 1. Class Attributes: the variables defined directly in the class that are shared by all objects of the class. Class attributes can be accessed using the class name as well as using the objects. 2. Constructor: the constructor method is invoked automatically whenever a new object of a class is instantiated, The constructor must have a special name _init_() and a special parameter called self. 3. Instance Attributes: attributes or properties attached to an instance of a class. Instance attributes are defined in the constructor. 4. Class Methods: You can define as many methods as you want in a class using the def keyword. Each method must have the first parameter, generally named as self, which refers to the calling instance.