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