如何使用Python获取电子邮件的收件人?

假设我有一封电子邮件 sample.eml 我想得到那封邮件上所有收件人的名单。假设它看起来像这样:

From: wayne@example.com
To: Person Man <person.man@example.com>, Fredrick Douglas <music.man@example.org>
Cc: Guido <bdfl@example.com>, FLUFL <barry@example.com>
Bcc: spanish.inquisition@example.com, The Dude <big.lebowski@example.net>
Subject: Testing email

This isn't a very fancy email, but I'm just trying to prove a point here, OK?

我可以将其粘贴到Python脚本中并解析电子邮件:

from email.parser import BytesParser
from itertools import chain

msg = b'''
From: wayne@example.com
To: Person Man <person.man@example.com>, Fredrick Douglas <music.man@example.org>
Cc: Guido <bdfl@example.com>, FLUFL <barry@example.com>
Bcc: spanish.inquisition@example.com, The Dude <big.lebowski@example.net>
Subject: Testing email

This isn't a very fancy email, but I'm just trying to prove a point here, OK?
'''.strip()
email = BytesParser().parsebytes(msg)

for recipient in chain(email.get_all('to'), email.get_all('cc'), email.get_all('bcc')):
    print('Recipient is:', repr(recipient))

Recipient is: 'Person Man <person.man@example.com>'
Recipient is: 'Fredrick Douglas <music.man@example.org>'
Recipient is: 'Guido <bdfl@example.com>'
Recipient is: 'FLUFL <barry@example.com>'
Recipient is: 'spanish.inquisition@example.com'
Recipient is: 'The Dude <big.lebowski@example.net>'

相反,我得到的是:

Recipient is: 'Person Man <person.man@example.com>, Fredrick Douglas <music.man@example.org>'
Recipient is: 'Guido <bdfl@example.com>, FLUFL <barry@example.com>'
Recipient is: 'spanish.inquisition@example.com, The Dude <big.lebowski@example.net>'

有更好的方法吗?