python之无法从 python 发送带有附件的电子邮件

import smtplib 
from email.MIMEMultipart import MIMEMultipart 
from email.MIMEText import MIMEText 
from email.MIMEImage import MIMEImage 
 
msg = MIMEMultipart('multipart/related') 
 
fromaddr = 'from@gmail.com' 
toaddrs = 'to@gmail.com' 
 
 
#provide gmail user name and password 
username = 'to@gmail.com' 
password = 'messifan' 
 
filename = "1.jpg" 
f = file(filename) 
attachment = MIMEImage(f.read()) # error here 
attachment.add_header('Content-Disposition', 'attachment', filename=filename) 
. 
. 
server.sendmail(fromaddr, toaddrs, msg.as_string())    

我正在使用此代码发送电子邮件。我可以使用此脚本附加文本文件。(将 MIMEImage 转换为 MIMEtext)。但无法附加图像。 错误是无法猜测图像 mime 子类型

请您参考如下方法:

尝试

attachment = MIMEImage(f.read(), _subtype="jpeg") # error here