#货物   货品名---价格
list_goods = [
    {'name':'苹果','price': 9.9},
    {'name':'香蕉','price':2.23},
    {'name':'橘子','price':3.2},
    {'name':'香瓜','price':5},
    {'name':'西瓜','price':2.2},
    {'name':'火龙果','price':6},
    {'name':'李子','price':3},

];

user_list_goods = [

]
user_dic_goods = {

}
all_price = 0
print("欢迎光临！")

money = input("付款>>>").strip()

end_choose_flag = False
if money.isdigit() and int(money) > 0:
    money_int = int(money)
    while not end_choose_flag:
        for i,good in enumerate(list_goods) :
            print("序号{} 商品：{}  价格{}".format(i,good['name'],good['price']))
        good_series_num = input('请输入你要的商品序号,退出请按Q>>>')
        if good_series_num.upper() == 'Q':
            break
        elif good_series_num.isdigit() and int(good_series_num) in range(0,len(list_goods)) :
            good_num = input('请输入你要的商品数量(如需删除/清空，请输入对应商品负数数量)>>>')
            price = list_goods[int(good_series_num)]['price']*int(good_num)
            current_good_msg = {
                    'name':list_goods[int(good_series_num)]['name'],
                    'msg':{'num':int(good_num), 'price':price}
            }
            if price >= money_int - all_price :#余额不足的情况
                while 1:
                    choose = input("当前货品总价格为：{},余额不足,是否充值？Y/N".format(all_price + price))
                    if choose.upper() == 'Y':
                        add_money = input("充值金额>>>")
                        if add_money.isdigit() and int(add_money) > 0:
                            money_int += int(add_money)
                            print('money int {}, price :{}'.format(money_int,price))
                            if price > money_int - all_price :
                                continue
                            else:
                                all_price += price
                                if current_good_msg['name'] in user_dic_goods:
                                    user_dic_goods[current_good_msg['name']]['num'] += int(
                                        good_num)  # {'name':{'num','all_price'}}
                                    user_dic_goods[current_good_msg['name']]['price'] += price
                                else:
                                    user_dic_goods.setdefault(current_good_msg['name'], current_good_msg['msg'])

                                print(user_dic_goods)
                                break
                    elif choose.upper() == 'N':
                        end = input("是否前去结算？Y/N")
                        if end.upper() == 'Y':
                            end_choose_flag = True
                            break
                        elif end.upper() == 'N':
                            print("余额不足，无法继续操作，请充值！")
                        else:
                            print("您输入有误!")
            else:
                if int(good_num)>0:
                    all_price += price
                    if current_good_msg['name'] in user_dic_goods:
                        user_dic_goods[current_good_msg['name']]['num'] += int(good_num) #{'name':{'num','all_price'}}
                        user_dic_goods[current_good_msg['name']]['price'] += price
                    else:
                        user_dic_goods.setdefault(current_good_msg['name'],current_good_msg['msg'])
                    print(user_dic_goods)
                    print("当前购物车总值{},余额 {}".format(all_price,money_int - all_price))
                else:#删除

                    if current_good_msg['name'] in user_dic_goods:
                        check_del = input("是否删除?对应数量商品？Y/N")
                        if check_del.upper() == 'Y':
                            if int(good_num) < user_dic_goods[current_good_msg['name']]['num']:
                                user_dic_goods[current_good_msg['name']]['num'] += int(good_num) #{'name':{'num','all_price'}}
                                user_dic_goods[current_good_msg['name']]['price'] += price
                            else:
                                check_clear = input("是否清空对应商品?Y/N")
                                if check_clear.upper() == 'Y':
                                    temp = user_dic_goods.pop(user_dic_goods[current_good_msg['name']])
                                print(user_dic_goods)
                                print("当前购物车总值{},余额 {}".format(all_price, money_int - all_price))
                    else:
                        print("您输入的数量有误，请重新输入")
                        continue
                    print(user_dic_goods)
                    print("当前购物车总值{},余额 {}".format(all_price,money_int - all_price))
                #user_list_goods.append(current_good_msg)
        else:
            print("输入有误，请重新输入！")
    #结算
    print("当前清单：")
    for k,v in user_dic_goods.items():
        print("{}   数量{}  总值{}".format(k,v['num'],v['price']))
    print("总计：{},找余{}".format(all_price,money_int - all_price))
else:
    print("请给合法的纸币付款")

　　

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