python 类的组合

# #组合的用途就是用来类与类之间的关联

#什么时候用组合：
#当类之间有显著不同，并且较小的类是较大的类所需要的组件时，用组合比较好

# class School:
#     def __init__(self,name,addr):
#         self.name=name
#         self.addr=addr
#     def zhao_sheng(self):
#         print('%s 正在招生' %self.name)
# class Course:
#     def __init__(self,name,price,period,school,teacher):
#         self.name=name
#         self.price=price
#         self.period=period
#         self.school=school     #关联Class School
#         self.teacher=teacher   #关联Class Teacger
# class Teacher:
#     def __init__(self,name,age,course):
#         self.name=name
#         self.age=age
#         self.course=course
#
#
# s1=School('oldboy','北京')
# s2=School('oldboy','南京')
# s3=School('oldboy','东京')
#
# t1=Teacher('王老师',28,'English')
# t2=Teacher('朱老师',38,'math')
# t3=Teacher('陈老师',39,'chinese')
# print(s2)
# 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:
#     print(msg)
#     menu={
#         '1':s1,
#         '2':s2,
#         '3':s3
#     }
#     choice=input('请选择学校>>:')
#     school_obj=menu[choice]
#     print(menu[choice])
#
#     teach_list={
#         '1':t1.name,
#         '2':t2.name,
#         '3':t3.name
#     }
#     print(teach_list)
#     choice_course=input('请选择任课老师>>:')
#     menu_teach = {
#         '1':t1,
#         '2':t2,
#         '3':t3
#     }
#
#     teach_obj=menu_teach[choice_course]
#
#     name=input('课程名>>: ')
#     price=input('课程费用>>:')
#     period=input('课程周期>>:')
#
#     new_course=Course(name,price,period,school_obj,teach_obj)
#     print('课程[%s]属于[%s]学校的[%s]教的'%(new_course.name,new_course.school.name,new_course.teacher.name))