python发邮件以附件的方式

#!/usr/bin/python
# -*- coding:UTF-8 -*-
import smtplib
from email.mime.text import MIMEText
from email.utils import formataddr
from email.header import Header
import sys
from email.mime.multipart import MIMEMultipart

def mail(recv_people):

    mail_host = 'smtp.126.com'
    mail_passwd = 'GMMVYVTTBJUVOGIC'

    send_people = '[email protected]'
#    recv_people = '[email protected]'

    msg = MIMEMultipart()
    msg['from'] = formataddr(["李根",send_people])
    msg['to'] = formataddr(["酱油人",recv_people])
    msg['Subject'] = Header("第三次测试",'utf-8')
    msg.attach(MIMEText('这是第三次测试','plain','utf-8'))

    att1 = MIMEText(open('222.txt','rb').read(),'base64','utf-8')
    att1["Content-Type"] = 'application/octet-stream'
    att1["Content-Disposition"] = 'attachment;filename="222.txt"'
    msg.attach(att1)
    

    smtp = smtplib.SMTP_SSL("smtp.126.com",465)
    smtp.login(send_people,mail_passwd)
    smtp.sendmail(send_people,[recv_people,],msg.as_string())

    smtp.quit()

#if __name__ == '__main__':
mail(sys.argv[1])