Python 发送带附件的email

from email.MIMEText import MIMEText
from email.MIMEMultipart import MIMEMultipart
import smtplib
mail_host = 'smtp.126.com'
mail_user = 'xx@126.com'
mail_pwd = 'xx'
mail_to = 'xxzhao@gmail.com'
msg = MIMEMultipart()
att = MIMEText(open('d:\a.txt','rb').read(),'base64','gb2312')
att["Content-Type"] = 'application/octet-stream'
att["Content-Disposition"] = 'attachment;filename="hello.txt"'
msg.attach(att)
message = 'content part'
body = MIMEText(message)
msg.attach(body)
msg['To'] = mail_to
msg['from'] = mail_user
msg['subject'] = 'this is a python test mail'
try:
    s = smtplib.SMTP()
    s.connect(mail_host)
    s.login(mail_user,mail_pwd)

s.sendmail(mail_user,mail_to,msg.as_string())
s.close()

print 'success'

except Exception,e:
    print e</pre>