usr/bin/python

--coding:utf-8--

class DVD:

def __init__(self,name,price,status):
    self.name = name
    self.price = price
    self.status = status

if name == "__main__":

# 0 未借出  1 借出
a = DVD("盗梦空间",10,1)
b = DVD("星际穿越",20,0)
c = DVD("黑客帝国",30,1)
dvds = {a.name:a,b.name:b,c.name:c}
print(dvds)
while True:
    print("——————————DVD管理系统————————————")
    print("1,查询所有DVD")
    print("2,增加DVD")
    print("3,借出DVD")
    print('4,归还DVD')
    print("5,退出")
    print("----------------------------------------------------------")
    i = int(input("请选择您要进行的操作："))

    if i == 5:
        break
    elif i == 1:
        print("名称".center(20) + "价格".center(20) + "状态".center(10))
        for key in dvds.keys():
            print(dvds.get(key).status)
            if dvds.get(key).status == 0:
                print(key.center(18) + str(dvds.get(key).price).center(21) + "未借出".center(11))
            else:
                print(key.center(18) + str(dvds.get(key).price).center(21) + "已借出".center(11))
    elif i == 2:
        name = input("\t请输入要添加的DVD的名称：")
        while name in dvds.keys():
            name = input("\t该DVD已经存在，请重新输入：")
        else:
            price = input("\t请输入要添加的DVD的价格：")
            new_dvd = DVD(name,price,0)
            dvds[name] = new_dvd
            print("添加成功！！！")
    elif i == 3:
        while True:
            name = input("\t请输入要借出的DVD名称：")
            if  name not in dvds.keys():
                print('\t\t没有该DVD，请重新输入！')
            elif dvds.get(name).status == 1:
                print('\t\t已经借出，请重新输入！')
            else:
                print("{}借出成功！！".format(name))
                dvds.get(name).status = 1
                break
    elif i == 4:
        while True:
            name = input("\t请输入要归还的DVD名称：")
            if name not in dvds.keys():
                print("\t\t不存在，请重新输入！")
            elif dvds.get(name).status == 0:
                print("\t\t该DVD没有被借出,请新输入：")
            else:
                days = int(input("\t请输入借出天数："))
                print("请扫一扫：",int(dvds.get(name).price) * days,"元")
                dvds.get(name).status = 0
                print("归还成功！！")
                break