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