python—day21

Posted 2020-10-31 kermitjam

类的使用有两种：

一种继承：描述类与类之间的关系，表示什么是什么的什么？

另一种就是组合：

组合就是一个类，该类拥有的属性是来自另一个类，就叫做类的组合使用；

 1 class People:
 2     def __init__(self,name,age,sex):
 3         self.name = name
 4         self.age = age
 5         self.sex = sex
 6 
 7 class Teacher(People):
 8 
 9     def __init__(self,name,age,sex,level,sal):
10         super().__init__(name,age,sex)
11         self.levle = level
12         self.sal = sal
13         self.course = []
14 
15     def change_score(self):
16 
17         print(‘%s changing to score‘ %self.name)
18 
19 
20     def teacher_data(self):
21         print(‘老师%s课程信息如下：‘ %(self.name).center(50,‘=‘))
22         for course in self.course:
23             course.info()
24 class student(People):
25     def __init__(self,name,age,sex):
26         super().__init__(name,age,sex)
27         self.course = []
28 
29     def choice_courses(self):
30         print(‘%s choicing course...‘ %self.name)
31 
32     def student_data(self):
33         print(‘学生%s课程信息如下：‘ %(self.name).center(50,‘=‘))
34         for course in self.course:
35             course.info()
36 
37 class Course:
38     def __init__(self,cname,tras,price):
39         self.cname = cname
40         self.tras = tras
41         self.price = price
42 
43     def info(self):
44         print(‘‘‘
45         课程：%s
46         周期：%s
47         价格：%s
48 
49         ‘‘‘
50 
51               %(self.cname,self.tras,self.price))
52 
53 
54 t1 = Teacher(‘egon‘,18,‘male‘,10,120000)
55 s1 = student(‘kermit‘,18,‘male‘)
56 python = Course(‘python‘,‘4mon‘,15000)
57 linux = Course(‘linux‘,‘5mon‘,12000)
58 go = Course(‘go‘,‘3mon‘,18000)
59 
60 t1.course.append(python)
61 t1.course.append(linux)
62 t1.course.append(go)
63 t1.teacher_data()
64 
65 s1.course.append(python)
66 s1.course.append(linux)
67 s1.course.append(go)
68 s1.student_data()