选择列表/元组中的元素

Question

这里有一些初学者问题，我已经使用imaplib连接到一个imap服务器并获取了一封电子邮件，它返回以下内容：

[('1 (BODY[HEADER.FIELDS (SUBJECT)] {62}', "Subject: Gmail is different. Here's what you need to know.\r\n\r\n"), ')']

我的问题是我如何只选择主题元素（“主题：Gmail是......”）。

我尝试过几种组合但尚未成功。

感谢您的帮助！

Answer 1

a[0][1]

其中a是字符串。

Answer 2

    email=[('1 (BODY[HEADER.FIELDS (SUBJECT)] {62}', "Subject: Gmail is different. Here's what you need to know.\r\n\r\n"), ')']
    for subj in (subject for element in email for subject in element if subject.startswith("Subject")):
        print subj
""" Output
    Subject: Gmail is different. Here's what you need to know.
"""