经典类与新式类的继承顺序

Posted 2020-11-03 zhong2018

 1 #经典类与新式类的继承顺序
 2 
 3 class Teacher(object):
 4     cn=‘Harvard‘
 5     def __init__(self,name,age,sex):
 6         self.name=name
 7         self.age=age
 8         self.sex=sex
 9         self.__money=5600
10 
11     def show_private_attribule(self):
12         print(‘private attribute:%s‘ %self.__money)
13 
14 class Master(Teacher):
15     def __init__(self,name,age,sex,subject):
16         Teacher.__init__(self,name,age,sex)#重构父类的构造函数，继承多个就多写一个
17         #super(Master,self).__init__(name,age,sex) #通用写法，继承多个父类都可以用这一个
18                                                 #继承多个类，只运行第一个类的构造函数，其它的不运行
19                                                 #没有，横向逐个找，向上找(查找策略：广度优先 )（新式类）
20                                                 #python2.x是深度优先 （经典类）
21         self.subject=subject
22         print(‘in the Master‘)
23 
24     def speak(self):
25         print(‘I am master %s I study %s subject‘ %(self.name,self.subject))
26 
27 class Doctor(Teacher):
28     def __init__(self,name,age,sex,allowance):
29         Teacher.__init__(self, name, age, sex)
30         #super(Doctor,self).__init__(name,age,sex)
31         self.allowance=allowance
32         print(‘in the Doctor‘)
33 
34     def ralation(self,obj):
35         print(‘%s is %s \‘s student‘ %(obj.name,self.name))
36 
37 class Specialist(Master,Doctor):
38     def __init__(self,name,age,sex,subject,allowance,research_field):#先查找Master构造执行，没有向Doctor查找，再没有向上Teacher查找
39         Master.__init__(self,name,age,sex,subject)
40         Doctor.__init__(self,name,age,sex,allowance)
41         self.research_field=research_field
42         print(‘in the Specialist‘)
43 
44 t1=Teacher(‘Jack‘,26,‘M‘)
45 m1=Master(‘Alice‘,22,‘F‘,‘French‘)
46 d1=Doctor(‘Monica‘,28,‘F‘,6600)
47 s1=Specialist(‘Jones‘,32,‘F‘,‘French‘,6600,‘language‘)