我有一個問題，我需要從電子郵件標題的以下部分獲取IP地址。使用正則表達式從電子郵件標題查找IP地址
Received: from smtprelay.b.mail.com (smtprelay0225.b.mail.com. [11.11.11.11])
by mx.google.com with ESMTP id g7si12282480pat.225.2014.07.26.06.53.24
for <[email protected]>;
我只需要輸出11.11.11.11在Python中使用正則表達式。
幫助將不勝感激。
謝謝。
(?<=\[)\d+(?:\.\d+){3}(?=\])
試試這個。使用re.findall。
import re
p = re.compile(ur'(?<=\[)\d+(?:\.\d+){3}(?=\])')
test_str = u"Received: from smtprelay.b.mail.com (smtprelay0225.b.mail.com. [11.11.11.11])\n by mx.google.com with ESMTP id g7si12282480pat.225.2014.07.26.06.53.24\n for <[email protected]>;"
re.findall(p, test_str)
查看演示。
好像你正在試圖獲取這是目前內[]括號內的數據。
>>> import re
>>> s = """Received: from smtprelay.b.mail.com (smtprelay0225.b.mail.com. [11.11.11.11])
... by mx.google.com with ESMTP id g7si12282480pat.225.2014.07.26.06.53.24
... for <[email protected]>;"""
>>> re.search(r'(?<=\[)[^\[\]]*(?=\])', s).group()
'11.11.11.11'
OR
>>> re.findall(r'(?<![.\d])\b\d{1,3}(?:\.\d{1,3}){3}\b(?![.\d])', s)
['11.11.11.11']
使用正則表達式
(?<=\[)\d{1,3}(?:\.\d{1,3}){3}(?=\])
提取IP
看到正則表達式是如何工作的：http://regex101.com/r/lI0rU3/1
x="""Received: from smtprelay.b.mail.com (smtprelay0225.b.mail.com. [11.11.11.11])
... by mx.google.com with ESMTP id g7si12282480pat.225.2014.07.26.06.53.24
... for <[email protected]>;"""
>>> re.findall(r'(?<=\[)\d{1,3}(?:\.\d{1,3}){3}(?=\])', x)
['11.11.11.11']
>>> import re
>>> a="""from smtprelay.b.mail.com (smtprelay0225.b.mail.com. [11.11.11.11])
... by mx.google.com with ESMTP id g7si12282480pat.225.2014.07.26.06.53.24
... for <[email protected]>;"""
>>> re.findall(r'\[(.*)\]',a)
['11.11.11.11']
>>> f=open("file")
>>> for line in f:
... if "Received" in line:
... print line.split("]")[0].split("[")[-1]
...
11.11.11.11
這就像一個魅力.. – Avinash 2014-10-30 07:26:51
@Avinash很高興聽到它的工作!!!。確認你喜歡的任何答案，以便其他答案對你有所幫助 – nu11p01n73R 2014-10-30 08:25:34