phthon学习-------组合

class Hand:
    pass
class Foot:
    pass
class Trunk:
    pass
class Head:
    pass

class Person:
    def __init__(self,id_num,name):
        self.id_num=id_num
        self.name=name
        self.hand=Hand()
        self.foot=Foot()
        self.trunk=Trunk()
        self.head=Head()

# p1=Person(‘11111‘,‘张三‘)
# print(p1.__dict__)


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

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

s1=School(‘刘家小学‘,‘北京‘)
s2=School(‘刘家小学‘,‘南京‘)
s3=School(‘刘家小学‘,‘东京‘)

#c1=Course(‘linux‘,10,‘1h‘,‘刘家小学‘)无意义
c1=Course(‘linux‘,10,‘1h‘,s1)
print(c1.school) #<__main__.School object at 0x0000000002878508>
print(c1.school.name) #刘家小学

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

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

s1=School(‘刘家小学‘,‘北京‘)
s2=School(‘刘家小学‘,‘南京‘)
s3=School(‘刘家小学‘,‘东京‘)

#c1=Course(‘linux‘,10,‘1h‘,‘刘家小学‘)无意义
# c1=Course(‘linux‘,10,‘1h‘,s1)
# print(c1.school) #<__main__.School object at 0x0000000002878508>
# print(c1.school.name) #刘家小学

msg=‘‘‘
1.刘家小学 北京
2.刘家小学 南京
3.刘家小学 东京
‘‘‘
while True:
    print(msg)
    menu={
        ‘1‘:s1,
        ‘2‘:s2,
        ‘3‘:s3
    }
    choice=input(‘选择学校>>>‘)
    school_obj=menu[choice]

    name=input(‘课程名:‘)
    price= input(‘课程费用：‘)
    period=input(‘课程时间‘)

    new_coures=Course(name,price,period,school_obj)
    print(‘课程[%s] 属于【%s】学习,在【%s】‘ %(new_coures.name,new_coures.school.name,new_coures.school.addr))

# 1.刘家小学 北京
# 2.刘家小学 南京
# 3.刘家小学 东京
#
# 选择学校>>>3
# 课程名:学茶道
# 课程费用：30
# 课程时间2H