# 组合： 组合就是把类和类链接起来，
#实例操作;学校   老师  课程建立关系
class School:
    def __init__(self,name,addr):
        self.name=name,
        self.addr=addr

class Teach:
    def __init__(self,name,zhiji):
        self.ID=name ,
        self.zhiji=zhiji

class Kecheng:
    def __init__(self,name,keshi,jiage,school,teach):
        self.keshi=keshi,
        self.neirong=jiage,
        self.name=name,
        self.school=school,
        self.teach=teach

s1= School("清华","北京")
s2= School("清华","北京1")
s3= School("清华","北京3")
msg="""
1 清华 北京校区
2 清华 北京1校区
3 清华 北京2校区
"""
menu={
    "1":s1,
    "2":s2,
    "3":s3
}
choice=input("选择学校>>>>:")
school=menu[choice]#实例化学校

name=input("课程名>>>>:")
keshi=input("课时>>>>:")
jiage=input("价格>>>>:")


t1= Teach("张三","40000")
t2= Teach("李四","7000")
t3= Teach("李四","7000")
laoshi={
    "1":t1,
    "2":t2,
    "3":t3
}

choice1=input("选择老师>>>>:")
teach=menu[choice1]#实例化老师

#课程和学校关系
new_kecheng=Kecheng(name,keshi,jiage,school,teach)
print("课程【%s】属于【%s】学校"%(new_kecheng.name,new_kecheng.school.name))

#老师关联学校 课时

new_kecheng1=Kecheng(name,keshi,jiage,school,teach)
print("【%s】老师在【%s】学校上【%s】课程"%(new_kecheng1.teach.ID,new_kecheng1.school.name,new_kecheng1.name))