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in python, class variables and static variables are two concepts that are often confused due to their similarities. however, they serve different purposes and have distinct behaviors. in this tutorial, we'll explore the differences between class variables and static variables, and provide code examples to illustrate their usage.
class variables are shared among all instances of a class. they are defined within the class but outside of any methods. class variables are used to store data that is common to all instances of the class. when the value of a class variable is modified, the change is reflected in all instances of the class.
let's create a simple example to demonstrate class variables:
in this example, the species variable is a class variable shared among all instances of the dog class.
static variables, also known as class-level variables, are defined using the @staticmethod decorator. they are associated with the class rather than instances of the class. static variables are often used for utility functions that don't require access to instance-specific data.
let's create a static variable example:
in this example, add and multiply are static methods that operate on their parameters without relying on any instance-specific data.
in summary, class variables are shared among instances of a class and are defined within the class itself. on the other hand, static variables are associated with the class and are defined using the @staticmethod decorator. understanding the differences between these concepts will help you design more effective and modular python classes.
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