如何在Python中从RFC 2822邮件头中提取多个电子邮件地址？

Question

Python的email模块非常适合解析邮件头。然而，To:头部可能有多个收件人，并且可能有多个To:头部。那么如何拆分每个电子邮件地址呢？我不能通过逗号分割，因为逗号可能被引用。有没有办法做到这一点？

演示代码：

msg="""To: [e-mail], "User Two" <[e-mail]", "Three, User <[e-mail]>                               
From: [e-mail]                                                                                                      
Subject: This is a subject                                                                                                      

This is the message.                                                                                                            
"""

import email

msg822 = email.message_from_string(msg)
for to in msg822.get_all("To"):
    print("To:",to)

当前输出：

$ python x.py
To: [e-mail], "User Two" <[e-mail]", "Three, User <[e-mail]>
$ 

- vy32

---

你想要什么输出？ - Robᵩ

可能你应该选择 shlex & Co.。MDAs 通过（未引用的）逗号来分割地址行。 - user3159253

相关内容：https://docs.python.org/2/library/email.util.html#email.utils.getaddresses - Robᵩ

Answer 1

将所有To行通过email.utils.getaddresses()处理：

msg="""To: [e-mail], John Doe <[e-mail]>, "Public, John Q." <[e-mail]>
From: [e-mail]
Subject: This is a subject

This is the message.
"""

import email

msg822 = email.message_from_string(msg)
for to in email.utils.getaddresses(msg822.get_all("To", [])):
    print("To:",to)

请注意，我重新编写了您的To行。 我认为您的示例格式无效。

参考资料：https://docs.python.org/3/library/email.utils.html#email.utils.getaddresses

- Robᵩ

---

太好了。我阅读了文档，但是我找不到我要找的内容。谢谢！ - vy32

Python 3的链接：https://docs.python.org/3/library/email.utils.html#email.utils.getaddresses - Neara

@Neara - 谢谢。已更新。 - Robᵩ