使用python从字符串获取电子邮件ID的最佳方式

Question

用什么方式可以从下面的字符串中使用python获得'X-Mailer-recipient：'电子邮件ID。

使用re？

Received: from localhost6.localdomain6 (unknown [59.92.85.188]) 
     by smtp.webfaction.com (Postfix) with ESMTP id 05B332078BD1 
     for <[email protected]>; Fri, 26 Aug 2011 04:59:36 -0500 (CDT) 
    Content-Type: text/html; charset="utf-8" 
    MIME-Version: 1.0 
    Content-Transfer-Encoding: 7bit 
    Subject: Test subject100 
    From: [email protected] 
    To: [email protected] 
    Date: Fri, 26 Aug 2011 10:01:39 -0000 
    Message-ID: <[email protected]> 
    X-Mailer-status: false 
    X-Mailer-recipient: [email protected] 

感谢

Answer 1

您也可以使用这样的事情：

d = """Received: from localhost6.localdomain6 (unknown [59.92.85.188]) by smtp.webfaction.com (Postfix) with ESMTP id 05B332078BD1 for <[email protected]>; Fri, 26 Aug 2011 04:59:36 -0500 (CDT) Content-Type: text/html; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: Test subject100 From: [email protected] To: [email protected] Date: Fri, 26 Aug 2011 10:01:39 -0000 Message-ID: <[email protected]> X-Mailer-status: false X-Mailer-recipient: [email protected]""" 

if 'X-Mailer-recipient:' in d: 
    d.split('X-Mailer-recipient:')[1].split()[0] 
>>> [email protected] 

Answer 2

使用正则表达式X-Mailer-recipient:\s*(.*)。您可以在Python中使用正则表达式，详见here。您需要确保您不会意外地包含您正在查找的文本。例如，上面的正则表达式可以匹配所有的“X-Mailer-recipient：[email protected] BLARG BLARG BLARG”。然后您需要访问所需的捕获组。

Answer 3

使用email包：

from email import message_from_string 

msg = '''Received: from localhost6.localdomain6 (unknown [59.92.85.188]) 
    by smtp.webfaction.com (Postfix) with ESMTP id 05B332078BD1 
    for <[email protected]>; Fri, 26 Aug 2011 04:59:36 -0500 (CDT) 
Content-Type: text/html; charset="utf-8" 
MIME-Version: 1.0 
Content-Transfer-Encoding: 7bit 
Subject: Test subject100 
From: [email protected] 
To: [email protected] 
Date: Fri, 26 Aug 2011 10:01:39 -0000 
Message-ID: <[email protected]> 
X-Mailer-status: false 
X-Mailer-recipient: [email protected] 
''' 
mail = message_from_string(msg) 
print mail['x-mailer-recipient'] 

使用正则表达式是不是一个好主意，因为一）头名不区分大小写，B）可以有多个具有相同名称的标题，c）一个标题可以包含另一个，例如有人可能会有邮件地址“X-Mailer-recipient：@ hotmail.com”，这会混淆基于正则表达式的方法。