vest = re.match(expression_vest, NetData)
 print vest.group(0)

运行时会得到这样的提示:
    print vest.group(1)
AttributeError: 'NoneType' object has no attribute 'group'

怎么回事儿呢?高人给说说~


迎风飘逸，pesoft at 126.com
2007-05-16 
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On 5/16/07, 迎风飘逸 <pesoft在126.com> wrote:
>
>
>  vest = re.match(expression_vest, NetData)

当匹配不成功时，re.match()会返回None,所以不能直接使用，要先判断一个结果是否不为None才可以，要这样：

if vest:
    print vest.group(0)

因为你没有考虑还有出错或不满足条件的情况。

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