如何使用python阅读电子邮件中出现的前3个(最新)线程

import imaplib
import email

mail = imaplib.IMAP4_SSL('邮件服务器地址', '端口号')
mail.login('用户名', '密码')

mail.select('INBOX')  # 选择收件箱

typ, data = mail.search(None, 'ALL')  # 搜索所有邮件
thread_ids = data[0].split()[-3:]  # 获取最新的三个线程ID

for thread_id in thread_ids:
    typ, data = mail.fetch(thread_id, '(RFC822)')
    raw_email = data[0][1]
    email_message = email.message_from_bytes(raw_email)
    
    # 从邮件消息中提取所需信息，例如发件人、主题等
    sender = email.utils.parseaddr(email_message['From'])[1]
    subject = email_message['Subject']
    
    # 打印或处理邮件信息
    print('发件人:', sender)
    print('主题:', subject)

mail.logout()