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Python how to achieve class static methods and class methods, many novices are not very clear about this, in order to help you solve this problem, the following editor will explain in detail for you, people with this need can come to learn, I hope you can gain something.

I. the jobs monitored by the properties of the class

Case: make a property value of a class greater than 10

Train of thought:

1. Set up a class

two。 Define a _ _ setattr__ method to monitor properties

3. Instantiate the class and set the properties of the class

4. Check the value of the property of the class to see whether the property monitoring is successful or not

2. Static methods of classes

Precede the method name in the class with a header tag @ staticmethod. Static methods are often used in some custom classes to achieve some general functions, which makes it convenient for us to call the methods of the class. Static methods of a class do not need parameters such as self, because static methods of a class can be called without instantiation.

Third, the class method of class

Precede the method name in the class with a header tag @ classmethod.

The invocation of the class method of the class does not need to be instantiated.

The class method of a class is a supplement to the constructor of the class in python.

Definition and invocation of static methods

Definition:

@ staticmethod

The method name of the def class:

Method subject

Give an example

@ staticmethod

Def say ():

Print ("We are static methods, and I don't need to instantiate to be called")

Call:

The name of the class. Method name ()

Person.say ()

Class methods are similar to static methods

Definition:

@ classmethod

Def setName (cls):

Name= "test class methods"

Print (name)

Call:

Person.setName ()

The main difference between a static method of a class and a class method is that the header tag is different when the method is defined. But when defining a class method, you need a parameter of the class itself.

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