面向对象组合

class School:
    def __init__(self, name, addr):
        self.name = name
        self.addr = addr

class Teacher:
    def __init__(self,name,gender,age):
        self.name = name
        self.gender = gender
        self.age = age

class Course:
    def __init__(self, name, price, period, school):
        self.name = name
        self.price = price
        self.period = period
        self.school = school


s1 = School('oldboy', '北京')
s2 = School('oldboy', '南京')
s3 = School('oldboy', '东京')
# c1 = Course('linux',10,1,s1)
# print(c1.school.name)
msg = '''1  老男孩  北京校区
2  老男孩   南京校区
3   老男孩  东京校区
'''
while True:
    menu = {
        '1': s1,
        '2': s2,
        '3': s3
    }
    print(msg)
    choice = input('请输入选择的校区》》》')
    school_obj = menu[choice]
    course = input('请输入选择的课程》》》')
    price = input('请输入缴纳的价格》》》')
    period = input('请输入学习的周期》》》')
    course_obj = Course(course,price,period,school_obj)
    print(course_obj.school.name)
输出：
1  老男孩  北京校区
2  老男孩   南京校区
3   老男孩  东京校区

请输入选择的校区》》》2
请输入选择的课程》》》python
请输入缴纳的价格》》》10000
请输入学习的周期》》》3个月
oldboy