Python cultivation------Object-oriented

Object-Oriented-----classes

Class: A class is a data structure that is like a model that is used to represent a class of things (things are the combination of data and actions) that are used to produce real objects (instances).

Object: What is the object: Open your eyes, everything you see is a single object, you can understand the object as a specific thing (things are the combination of data and action)

Class-To-object relationships: objects are created by the class, God makes people, God first has a template for human beings, this template is the human class, then God according to the definition of the class to produce a person

#creation of Class"""Class Name: "Data Attribute" "def function Property""""#Note: Classes and objects use points to access their properties#class Chinese:#dang= " Egg and Egg"#def wugong (self):#print ("Drop Dragon 18 Palm")#print (chinese.__dict__) #把Chinese class all properties get encapsulated into dictionary#print (chinese.__dict__["Dang"]) #通过key执行方法#chinese.__dict__["Wugong" (1)#{' __weakref__ ': <attribute ' __weakref__ ' of ' Chinese ' objects>, ' dang ': ' egg-balls ', ' wugong ': <function Chinese. Wugong at 0x0000007dd1850268>, ' __module__ ': ' __main__ ', ' __dict__ ': <attribute ' __dict__ ' of ' Chinese ' objects , ' __doc__ ': None}##18 Palms of the Dragon#Print (dir (Chinese))##class Chinese:#"I'm a love of the motherland."#country= "China"#def __init__ (self,name,sex,age):#Self.mingzi=name#Self.sex=sex#Self.age=age#def Gongfu (self):#print ("%s with Dragon 18 Palm"%self.mingzi)#def Zhaoji (self):#print ("%s snapped a sister"%self.mingzi)###D1=chinese ("Chenglonog", "Men",) #相当于执行类chinese下的__init__#print (D1) #<__main__.chinese object at 0x0000008758e03240>#print (d1.__dict__) # d1 {' Age ': $, ' sex ': ' Men ', ' mingzi ': ' Chenglonog '}#D1.gongfu () #先d1找gongfu can't find the Chinese .#Chenglonog the Dragon 18 Palm#2. Properties of the class#View class Properties#print (chinese.country) #China#modifying the properties of a class#chinese.country= "Japan"#print (chinese.country) #Japan#Delete the properties of a class#del chinese.country#print (chinese.country) #AttributeError: Type object ' Chinese ' has no attribute ' countr#Increase#chinese.yangjing= "BLACK"#print (chinese.yangjing) #黑色#Function Properties | | | | | function additions and deletions and data types are communicated#View function Properties#print (chinese.gongfu.__dict__)#Add function Properties#def Say_word (Self,word):#print ("%s speaks%s"% (Self.mingzi,word))#Chinese.say_word=say_word #创建属性函数sya_word | | | The function must be defined at the head first no self can not be created#D1.say_word ("The Birds") #chenglonog讲鸟语#Modifying function Properties#chinese.zhaoji=zhaole Error #NameError: Name ' Zhaole ' is not defined#def Zhao (self):#print ("%s snapped a sister"%self.mingzi)#Chinese.zhaoji=zhao#print (chinese.__dict__)#Modify Instance Properties | | | | Only adding data properties can also increase the function properties, but the call does not give the incoming value self, which does not recommend adding function properties#class Chinese:#"I'm a love of the motherland."#country= "China"#def __init__ (self,name,sex,age):#Self.mingzi=name#Self.sex=sex#Self.age=age#def Gongfu (self):#print ("%s with Dragon 18 Palm"%self.mingzi)#def Zhaoji (self):#print ("%s snapped a sister"%self.mingzi)###D1=chinese ("Chenglonog", "Men",) #相当于执行类chinese下的__init__#View#print (d1.__dict__) #{' Mingzi ': ' chenglonog ', ' sex ': ' Men ', ' age ':##Increase#d1.yanjing= "Brown"#print (d1.yanjing) #褐色#Modify#d1.yanjing= "Blue"#print (d1.yanjing) #蓝色#Delete#del d1.age#print (d1.__dict__) #{' yanjing ': ' Blue ', ' mingzi ': ' chenglonog ', ' sex ': ' Men '}#Scope of the class#1. #定义一个类, only one scope to use#class Mydata:#Pass#x=10#y=12#mydata.x=18#mydata.y=22#print (x, y) #10#print (MYDATA.X,MYDATA.Y) #18#country= "China"#class Chinese:#country= "China"#Globals () #声明全局变量#country= "Japan" #如果输出变量的话为 Japan#def __init__ (self,name):    #Self.name=name    #Print (country) #-------is a normal variable.#D1=chinese ("Cheng Long") #不加globals----"China | It is not through the class to find directly to find variables outside the class#print (d1.country) # China#print (d1.__dict__) # print (d1.__dict__)classMydata:country="Zhongguo"L=[]    def __init__(self,name): self.xingming=namedefprint1 (self):Print("Laura") D1=mydata ("Lao") D1.L=[1]#{' L ': [1], ' xingming ': ' Lao '} in D1 property dictionaryD1.l.append (4)#The D1 Dictionary has l[] in L will append all MyData data Properties l[]Print(D1.__dict__)

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Add:

Class A:
    def b (self):
        Print ("xxx")
    @staticmethod           #静态方法 The following function  can be called by A.C ()  
    Def c ():
        Print ("Oooo")
    @classmethod             #类方法 can also be called by the class  
    Def d (SB):
        Print (SB)
        Print ("Xoxoxo")

    @property              #属性
    def q (self):
        Print ("Ooooxxxx")
        Return 1

# A.C ()                      #oooo
# A.D ()                      #<class ' __main__.a ' >          xoxoxo

F=a ()
After #加上函数装饰器 @property
# Print (F.Q ())         #会报错 TypeError: ' Nonetype ' object is not callable
Print (F.Q)
>>>>>ooooxxxx
>>>>>1

Python cultivation------Object-oriented