如何在python中使用MIME发送电子邮件时向雷鸟发送附件？

import smtplib
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.mime.application import MIMEApplication

msg = MIMEMultipart()
msg['From'] = '发件人邮箱'
msg['To'] = '收件人邮箱'
msg['Subject'] = '邮件主题'

body = '邮件正文内容'
msg.attach(MIMEText(body, 'plain'))

attachment = MIMEApplication(open('附件文件路径', 'rb').read())
attachment.add_header('Content-Disposition', 'attachment', filename='附件文件名')
msg.attach(attachment)

smtp_server = 'SMTP服务器地址'
smtp_port = SMTP服务器端口号
username = '发件人邮箱'
password = '发件人邮箱密码'

with smtplib.SMTP(smtp_server, smtp_port) as server:
    server.login(username, password)
    server.send_message(msg)