import os
import time
import winsound
iplist = list()
ip = 'www.baidu.com'
while(1):
backinfo = os.system('ping -n 1 %s'%ip) # 实现pingIP地址的功能,-c1指发送报文一次,-w1指等待1秒
time.sleep(1)
if backinfo:
print('网络不通')
else:
duration = 1500 # millisecond
freq = 440 # Hz
winsound.Beep(freq, duration)
print ('backinfo',backinfo)