Python在发送电子邮件时将文件格式.xlsx更改为.aaf

import smtplib
from email.mime.multipart import MIMEMultipart
from email.mime.base import MIMEBase
from email import encoders

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

filename = '文件路径/文件名.xlsx'
new_filename = '文件路径/新文件名.aaf'

# 读取.xlsx文件
attachment = open(filename, 'rb')

# 创建MIMEBase对象，并设置文件类型和文件名
part = MIMEBase('application', 'octet-stream')
part.set_payload((attachment).read())
encoders.encode_base64(part)
part.add_header('Content-Disposition', "attachment; filename= %s" % new_filename)

# 将MIMEBase对象添加到MIMEMultipart对象中
msg.attach(part)

server = smtplib.SMTP('smtp.qq.com', 25)  # 使用腾讯云的SMTP服务器，端口号为25
server.starttls()  # 开启TLS加密
server.login('发件人邮箱', '邮箱授权码')  # 登录发件人邮箱
server.sendmail('发件人邮箱', '收件人邮箱', msg.as_string())  # 发送邮件
server.quit()  # 关闭连接