python发送邮件

# -*- coding: UTF-8 -*-
'''
@note: 实现对redis数据库监控功能，有变化发送邮件
'''
import redis
import time
import smtplib
from email.mime.text import MIMEText

red=redis.StrictRedis("172.16.2.156",6379,8)

mailto_list=['1234567@qq.com'] #邮件接收方
mail_host="smtp.163.com"  #设置邮件服务器
mail_user="abcd"    #用户名
mail_pass="abcd123"   #口令
mail_postfix="163.com"  #发件箱的后缀

def send_mail(to_list,sub,content):
me="scan_result"+"<"+mail_user+"@"+mail_postfix+">"
msg = MIMEText(content,_subtype='plain',_charset='gb2312')
msg['Subject'] = sub
msg['From'] = me
msg['To'] = ";".join(to_list)
try:
server = smtplib.SMTP()
server.connect(mail_host)
server.login(mail_user,mail_pass)
server.sendmail(me, to_list, msg.as_string())
server.close()
return True
except Exception, e:
print str(e)
return False

def loop():
lis=red.hgetall('alert').values()
num=len(lis)
time.sleep(10)
lis=red.hgetall('alert').values()
num_2=len(lis)
if num==num_2:
print 'no new keyword added......'
else:
if send_mail(mailto_list,"keywords","there have a keyword added ,please check inredis databases......"):
print "send email success......"
else:
print "send email false......"

if __name__ == '__main__':
while True:
try:
loop()
except:
continue