购物车进阶

li = [
    {'name':'苹果','price':10},
    {'name':'香蕉','price':20},
    {'name':'西瓜','price':30}
]
car = {}
print('欢迎光临AJ小店')
money = input('请输入您的余额')
if money.isdigit() and int(money) > 0:
    money = int(money)
    while 1:
        for i,k in enumerate(li):
            print('序号{}\t商品{}\t价格{}'.format(i+1,k['name'],k['price']))
        choose = input('请输入您要选择商品的序号/按q退出')
        if choose.isdigit():
            choose = int(choose)
            if choose > 0 and choose <= len(li):
                num = input('请输入您要购买商品的数量')
                if num.isdigit():
                    num = int(num)
                    if li[choose-1]['price'] * num <= money:
                        money = money - li[choose - 1]['price'] * num
                        print('您的余额为{}'.format(money))

                        if li[choose-1]['name'] in car:
                            car[li[choose-1]['name']] = car[li[choose-1]['name']] + num
                        else:
                            car[li[choose-1]['name']] = num
                    else:
                        print('余额不足，请重新输入或输入q退出')
                    continue
                else:
                    print('请重新输入')
                car[choose-1]['商品'] = li[choose-1]
            else:
                print('请输入正确的序号')
        elif choose == 'q':
            break
        else:
            print('输入错误，请重新输入')
else:
    print('对不起，请重新输入')
for a,b in car.items():
    print('商品{}\t数量{}'.format(a,b))