购物车

# 1、启动程序后，让用户输入工资，然后进入循环，打印商品列表和编号
# 2、允许用户根据商品编号选择商品
# 3、用户选择商品后，检测余额是否够，够就直接扣款，并加入购物车， 不够就提醒余额不足
# 4、可随时退出，退出时，打印已购买商品和余额
# -*- encoding: utf-8 -*-
goods = [
{"name": "电脑", "price": 1999},
{"name": "鼠标", "price": 10},
{"name": "游艇", "price": 20},
{"name": "美女", "price": 998}
]
money = input('total money:').strip()
while not money.isdigit():
    print('input error! ')
    money = input('total money:').strip()
money = int(money)
for i in enumerate(goods):
    print(i)
flag = True
shop_list = []
cost = 0
res = money
while flag:
    shops_add = input('select one thing:').strip()
    if shops_add.isdigit():
        if int(shops_add) in range(len(goods)):
            print(type(goods[int(shops_add)]['name']))
            shop_list.append(goods[int(shops_add)]['name'])
            cost += goods[int(shops_add)]['price']
            res = money - cost
            if res < 0:
                flag = False
                print('余额不足')
        else:
            print('no select thing in the shop list!')
    elif shops_add.upper() == 'Q':
        flag = False
        print('you have bought these things:{0},your res is {1}'.format(shop_list,res))