instance and class variable in python
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In Python, instance variables and class variables are two types of variables that play different roles in object-oriented programming. Let's explore the concepts of instance and class variables with examples.
Instance variables are unique to each instance of a class. They represent the attributes of an object and are defined inside the constructor method (__init__). These variables are accessed using the self keyword.
In this example, name and age are instance variables. Each instance of the Dog class (i.e., dog1 and dog2) has its own set of these variables.
Class variables are shared among all instances of a class. They are defined outside any method in the class and are accessed using the class name or self within methods.
In this example, wheels is a class variable. All instances of the Car class share the same value for wheels.
Understanding the difference between instance and class variables is crucial for effective object-oriented programming in Python. Instance variables store unique data for each object, while class variables store shared data for all objects of the class. Proper usage of these variables enhances code clarity and flexibility.
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