Python Learning (Face object: Class)

I. Class body

A class body generally consists of two parts:

Variable part, also called static variable, static field.

Method (function) section.

classPerson :#"Body: two parts: Variable part, method (function) part" "Mind ='have thought'  #variables, static variables, static fieldsAnimal ='Advanced Animals'Faith='have faith'    def __init__(self,name,age,hobby): Self.name= Name#Person.money = ' using currency 'Self.age =Age Self.hobby=HobbydefWork (self):#methods, functions, dynamic variables        Print('%s will work ...'%self.name)defShop (self):Print('human beings can consume ....')Print(person.__dict__)#returns all the contents of the class as a dictionary (no additions or deletions can be made on this basis)

Print (person. __dict__ ['mind'])  # The content of key mind in query dictionary form

Two. Related operations in the class

1. At the angle of the class name

1. Enquiry

person.__dict__ all content in the query class (cannot be deleted or modified)

Variable name in person.__dict__[' class] query variable in class

2. The almighty '. ', make additions and deletions to the individual variables in the class

The name of the class. Already has a variable name #查询变量名对应的内容

The class name. New variable name = variable content #增加一个变量

The class name. Existing variable name-new variable content #对类中已有的变量名对应的变量内容进行修改

Del class name. already has a variable name #对类中的变量惊醒删除操作

3. Class names Call methods (functions) in a class

Class name. Method Name () #此处调用方法 (function) need to pass arguments to the function

2. At the angle of the object

This process of the class name + (): The process of instantiating (the process of a common object)

Automatically executes the __init__ method in the class, passing the object space to the self parameter of the __init__.

Encapsulates the appropriate properties for an object.

classPerson :" "class Body: Two parts: Variable part, method (function) part" " Mind='have thought'  #variables, static variables, static fieldsAnimal ='Advanced Animals'Faith='have faith'    def __init__(self,name,age,hobby): Self.name= Name#Person.money = ' using currency 'Self.age =Age Self.hobby=HobbydefWork (self):#methods, functions, dynamic variables        Print('%s will work ...'%self.name)defShop (self):Print('human beings can consume ....') ret= Person ('Alex', 1000,'Oldwomen')#creates an object, and the corresponding propertyPrint(Ret.__dict__)#querying the entire contents of an object

Print (ret.name)  # Check

= 175  #  Increase

del ret.name  #  Delete

# Change

3. Manipulating variables in a class at the object's angle (query only)

Object name. Variable Name

4. The object angle invokes a method (function) in the class #一般都是通过对象执行类中的方法

Object name. method (function) name

　　　　

Python Learning (Face object: Class)