Python 发送邮件附件

import smtplib

from os.path import basename
from email.mime.application import MIMEApplication
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.utils import COMMASPACE, formatdate

mail_host=''
mail_user=''
mail_pass=''
mail_postfix='' 

def send_mail(to_list,sub,content,files=None): 
    me='' + '<' + mail_user + '@' + mail_postfix + '>' 
    text = MIMEText(content,_subtype='html',_charset='utf-8')
    
    msg = MIMEMultipart()
    msg.attach(text)
    msg['Subject'] = sub
    msg['From'] = me
    msg['To'] = ';'.join(to_list)

    for f in files or []:
        with open(f, "rb") as fil:
            msg.attach(MIMEApplication(
                fil.read(),
                Content_Disposition='attachment; filename="%s"' % basename(f),
                Name=basename(f)
            ))

    try:
        s = smtplib.SMTP()
        s.connect(mail_host)
        s.login(mail_user,mail_pass)
        s.sendmail(me, to_list, msg.as_string())
        s.close()
        return True
    except Exception, e:
        print str(e)
        return False