Python Class Definition: Complete Guide

In Python, the keyword “class” is used to define a class. The class function is used to create a class and define its attributes and methods.

The syntax for using the class function is as follows:

class ClassName:
    # 属性
    attribute_1 = value_1
    attribute_2 = value_2
    
    # 方法
    def method_1(self, arg_1, arg_2):
        # 方法体
        ...
    
    def method_2(self, arg_1, arg_2):
        # 方法体
        ...

ClassName is the name of the class, which can be customized as needed. The attributes of the class are class variables that can be used in any method of the class. The methods of the class are functions used to perform specific operations. The first parameter of a method is usually “self,” which refers to an instance of the class.

Creating instances of a class can be done using the class function, which will result in a class object. For example:

obj = ClassName()

Then you can access and modify a class’s properties by calling the class’s methods using an object of the class.

In summary, the usage of the class function is to define a class, and within the class, define the attributes and methods of the class for creating instances of the class and calling its methods.