面向对象组合

 1 class School:
 2     def __init__(self, name, addr):
 3         self.name = name
 4         self.addr = addr
 5 
 6 class Teacher:
 7     def __init__(self,name,gender,age):
 8         self.name = name
 9         self.gender = gender
10         self.age = age
11 
12 class Course:
13     def __init__(self, name, price, period, school):
14         self.name = name
15         self.price = price
16         self.period = period
17         self.school = school
18 
19 
20 s1 = School('oldboy', '北京')
21 s2 = School('oldboy', '南京')
22 s3 = School('oldboy', '东京')
23 # c1 = Course('linux',10,1,s1)
24 # print(c1.school.name)
25 msg = '''1  老男孩  北京校区
26 2  老男孩   南京校区
27 3   老男孩  东京校区
28 '''
29 while True:
30     menu = {
31         '1': s1,
32         '2': s2,
33         '3': s3
34     }
35     print(msg)
36     choice = input('请输入选择的校区》》》')
37     school_obj = menu[choice]
38     course = input('请输入选择的课程》》》')
39     price = input('请输入缴纳的价格》》》')
40     period = input('请输入学习的周期》》》')
41     course_obj = Course(course,price,period,school_obj)
42     print(course_obj.school.name)
43 输出：
44 1  老男孩  北京校区
45 2  老男孩   南京校区
46 3   老男孩  东京校区
47 
48 请输入选择的校区》》》2
49 请输入选择的课程》》》python
50 请输入缴纳的价格》》》10000
51 请输入学习的周期》》》3个月
52 oldboy