python怎么实现smtplib发送带附件邮件小程序

#!/usr/bin/env python 
# -*- coding:utf-8 -*- 
import os 
import sys 
import time 
import smtplib 
from email import encoders 
from email.mime.text import MIMEText 
from email.mime.base import MIMEBase 
from email.mime.multipart import MIMEMultipart 
 
def send_mail(sub,content,mail_to,fileList): 
  mail_host='smtp.163.com' 
  mail_user='****@163.com' 
  mail_pass='******' 
  mail_to_list=mail_to.split(',') 
 
  msg = MIMEMultipart() 
  #msg=MIMEText(content,_charset='utf-8') 
  msg['Subject']=sub 
  msg['From']=mail_user 
  msg['To']=";".join(mail_to_list) 
  msg.attach(MIMEText(content,_charset='utf-8')) 
 
  files=fileList.split(',') 
  for f in files: 
    part = MIMEBase('application', 'octet-stream') #'octet-stream': binary data 
    part.set_payload(open(f, 'rb').read()) 
    encoders.encode_base64(part) 
    part.add_header('Content-Disposition', 'attachment; filename="%s"' % os.path.basename(f).encode('utf-8')) 
    msg.attach(part) 
 
  try: 
    s=smtplib.SMTP() 
    s.connect(mail_host) 
    s.login(mail_user,mail_pass) 
    s.sendmail(mail_user,mail_to_list,msg.as_string()) 
    s.close() 
    return True 
  except Exception, e: 
    print str(e) 
    return False 
 
if __name__=="__main__": 
  if len(sys.argv) == 5: 
    send_mail(sys.argv[1],sys.argv[2],sys.argv[3],sys.argv[4]) 
  else: 
    print '' 
    print '＊＊＊＊＊＊＊＊＊＊***************************************' 
    print ' Error: 请传入四个参数值：邮件主题 邮件内容 收件人 附件路径' 
    print '  如: python sendMail_func.py 邮件测试 邮件内容 abc@126.com,def@163.com,123456789@qq.com 1.xlsx,2.xlsx' 
    print '＊＊＊＊＊＊＊＊＊＊***************************************' 
    print '' 
    exit