python列表实现简单购物车

# -*- coding: UTF-8 -*-

print("---happy shopping---")


products = [["Book",54],["Water",3],["Rice",107.3],["phone",779.9],["fans",200.1]]
shopping_list = []

while True:
    money = input("So,how much money do you have?")
    if money.isdigit():
        money = int(money)
        break
    else:
        print("您的输入有误，请重新输入。")
        continue
while True:
    for i in range(len(products)):
        print("%s ---> 商品：%s 价格：%s" % ((i + 1), products[i][0], products[i][1]))
    x = input("选择您所需要的商品，请输入商品前的编号，或按q退出：")
    if x != ‘q‘:
        if x.isdigit():
            j = int(x)
        else:
            print("您的输入有误，请重新输入。")
            continue
        if products[j-1][1] <= money:
            shopping_list.append(products[j-1])
            money = money - products[j-1][1]
            print("您已购买%s。"%products[j-1][0])
            continue
        else:
            print("Sorry,您钱不够啦！")
            break
    else:
        print("您选择了退出。")
        break

if len(shopping_list) > 0:
    print("您购买了以下商品：")
    for k in range(len(shopping_list)):
        print(shopping_list[k][0],end="\t")
    print()
else:
    print("您没有购买商品。")

print("您还有%.2f元钱。"%money)