购物车代码

shopping = [[‘house‘,1000000],[‘book‘,50],[‘iphone‘,3000]]
qian = input(‘请输入你的钱:‘)
shoppingcar = []

if qian.isdigit():
    qian = int(qian)
    while True:
        for i,v in enumerate(shopping,1):
            print(i,v)
        goumai = input(‘请输入你要购买的商品编号(退出请按q)：‘)
        if goumai.isdigit():
            goumai = int(goumai)

            if 0<goumai<=len(shopping):
                goumait = shopping[goumai-1]
                if goumait[1] < qian:
                    qian -= goumait[1]
                    print(‘恭喜你购买成功%s，余额为%d‘%(goumait,qian))
                    shoppingcar.append(goumait)
                else:
                    print(‘你的余额不足‘)

            else:
                print(‘你输入的商品不存在，请重新输入‘)
        elif goumai == ‘q‘or goumai == ‘Q‘:
            print(‘您已经购买如下商品‘)
            for i in  shoppingcar:
                print(i)
            print(‘你还剩下，%d‘%qian)
            break
        else:
            print(‘你输入的商品不存在‘)


else:
    print(‘你输入RMB有误‘)