在python中使用带有imaplib.fetch的email.HeaderParser？

import imaplib
import email
from email.header import HeaderParser

# 登录邮箱账户
mail = imaplib.IMAP4_SSL("imap.example.com")
mail.login("username", "password")

# 选择邮箱文件夹
mail.select("inbox")

# 搜索邮件
status, messages = mail.search(None, "ALL")

# 获取邮件ID
messages = messages[0].split(b" ")

# 获取邮件头
status, data = mail.fetch(messages[-1], "(BODY[HEADER.FIELDS (SUBJECT FROM)]")

# 解析邮件头
header_parser = HeaderParser()
headers = header_parser.parsestr(data[0][1].decode())

# 打印邮件主题和发件人
print("Subject:", headers["Subject"])
print("From:", headers["From"])

# 注销邮箱
mail.logout()