购物车

products = [                     #定义商品列表
    ["Ipone",5800],
    ["Mac",15800],
    ["Coffee",30],
    ["Bike",2000],
    ["Cloth",500],
]

shopping_list = []    #空的购物车

while True:                            #循环输入工资
    salary = input("Your salary:")
    if salary.isdigit():            #判断输入是否为整型整数
        salary = int(salary)        #将字符串转化为数字
        break                       #正确执行就退出 
    else:
        continue                    #错误就循环执行


while True:
    print("product list".center(50,"-"))     #以 “-“ 为填充居中打印 “product list”  center：居中打印
    for index,i in enumerate(products):      #打印商品列表、价格
        print(index,".",i[0],i[1])
    choice = input("请输入商品编号[quit]>>:")
    if choice.isdigit():
        choice = int(choice)
        if choice >=0 and choice < len(products):  #判断列表长度：len
            #判读钱够不够
            p = products[choice]
            if salary >= p[1]:#买的起
                salary -= p[1] #扣钱
                shopping_list.append(p) #加入购物车
                print("Added 33[32;1m[%s]33[0m into your shopping cart,and your current balance is 33[41;1m%s33[0m" %(p[0],salary))   #彩色打印
            else:
                print("钱不够，你只有[%s]" % salary)
        else:
            print("没有此商品...")
    elif choice == "quit":   #输入quit退出
        print("已购买商品".center(50,"-"))
        for i in shopping_list:
            print(i)               #打印购物车
        print("Your left balance is ", salary)   #打印剩余余额
        exit()