Python正则表达式从字符串中提取MAC地址 [英] Python regex extract MAC addresses from string

问题描述

我需要帮助编写正则表达式，使用 python re 引擎:

I need help writing a regular expression, using the python re engine to:

1. 从文本文件中提取所有 MAC 地址
2. 使用以下格式提取所有字符串:foo bar ... MAC:ADDRESS ... baz bat \r\n

提前致谢！

我尝试了以下方法来提取 MAC 地址，但运气不佳:

I tried the following to extract MAC addresses, without luck:

import re
p = re.compile(ur'((?:(\d{1,2}|[a-fA-F]{1,2}){2})(?::|-*)){6}')
test_str = u"TEXT WITH SOME MAC ADDRESSES 00:24:17:b1:cc:cc TEXT CONTINUES WITH SOME MORE TEXT 20:89:86:9a:86:24"

found = re.findall(p, test_str)
for a in found:
    print a

推荐答案

我编造了以下内容:([0-9a-fA-F]:?){12} 以匹配 MAC 地址在正文中.

I have concocted the following: ([0-9a-fA-F]:?){12} to match MAC addresses in the text.

这是它应该如何工作:

• [0-9a-fA-F] 匹配用于表示十六进制数的字符
• :? 匹配一个可选的冒号
• (...){12} - 然后将所有这些分组并重复 12 次.12 因为一个 MAC 地址由 6 对十六进制数字组成，用冒号分隔

• [0-9a-fA-F] matches the characters used to represent hexadecimal numbers
• :? matches an optional colon
• (...){12} - all of this is then grouped and repeated 12 times. 12 because a MAC address consists of 6 pairs of hexadecimal numbers, separated by a colon

您可以在此处看到它的实际效果.

You can see it in action here .

Python 代码变为:

The Python code then becomes:

import re
p = re.compile(r'(?:[0-9a-fA-F]:?){12}')
test_str = u"TEXT WITH SOME MAC ADDRESSES 00:24:17:b1:cc:cc TEXT CONTINUES WITH SOME MORE TEXT 20:89:86:9a:86:24"

re.findall(p, test_str)

生产结果:

[u'00:24:17:b1:cc:cc', u'20:89:86:9a:86:24']

这篇关于Python正则表达式从字符串中提取MAC地址的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！