练习题 五

goods = [{"name": "电脑", "price": 1999},
{"name": "鼠标", "price": 10},
{"name": "游艇", "price": 20},
{"name": "美女", "price": 998}, ]

while 1: （while 循环  1 即 TRUE）
    for index in range(len(goods)):     （用for循环遍历 goods)
         print('{} {} {}'.format(index+1,goods[index]['name'],goods[index]['price']))  （格式化输出 ）   
    goods_num=input('请输入选项：输入Q或q退出程序').strip()

    if goods_num.isdigit():
        goods_num=int(goods_num)
        if 0 < goods_num <len(goods):
            print(goods[goods_num-1]['name'],goods[goods_num-1]['price'])
        else:
            print('输入的超出范围，请重新输入')
    elif    goods_num.upper()=='Q':
        break
    else:
        print('你输入的有非数字元素，请重新输入')