Python发送带附件的SMTP邮件代码

    #coding: utf-8  
    import smtplib  
    from email.mime.multipart import MIMEMultipart#python2.4及之前版本该模块不是这样调用的，而是email.MIMEMultipart.MIMEMultipart(),下同  
    from email.mime.text import MIMEText  
    from email.mime.image import MIMEImage  
    sender = '[email?protected]'#发件人地址  
    receiver = '[email?protected]'#收件人地址  
    smtpserver = 'smtp.qq.com'#邮件服务器  
    username = '123456789'#用户名  
    password = 'abcdefg'#密码  
    smtp = smtplib.SMTP()  
      
    def send_email(msg,file_name):  
        msgRoot = MIMEMultipart('related')  
        msgRoot['Subject'] = file_name#邮件标题，这里我把标题设成了你所发的附件名  
        msgText = MIMEText('%s'%msg,'html','utf-8')#你所发的文字信息将以html形式呈现  
        msgRoot.attach(msgText)  
        att = MIMEText(open('%s'%file_name,'rb').read(),'base64','utf-8')#添加附件  
        att["Content-Type"] = 'application/octet-stream'  
        att["Content-Disposition"] = 'attachment; filename="%s"'%file_name  
        msgRoot.attach(att)  
        while 1:#持续尝试发送，直到发送成功  
            try:  
                smtp.sendmail(sender,receiver,msgRoot.as_string())#发送邮件   
                break  
            except:  
                try:  
                    smtp.connect(smtpserver)#连接至邮件服务器  
                    smtp.login(username,password)#登录邮件服务器  
                except:  
                    print "failed to login to smtp server"#登录失败  
                      
    if __name__ == "__main__":  
        MSG=""#要发送的文字  
        FILE=""#要发送的文件  
        send_email(MSG,FILE)