python脚本设置超时机制系统时间的方法
本文为大家介绍了python脚本设置系统时间的方法，一共有两种，其一是调用socket直接发送udp包到国家授时中心，其二是调用ntplib包。我在本地电脑ping 国家授时中心地址cn.pool.ntp.org有时出现丢包，然而，二者都没有检查udp是否丢包的机制，方法一在udp丢包后一直处于阻塞状态无法退出，方法二虽然会提示超时，但是不再做其它尝试，比如重新发包，或者向同一个域名的不同IP地址发包。于是，尝试在方法一的代码基础上，增加了超时机制，并且尝试向同一个域名的不同IP地址发包。
具体修改后的完整代码如下：
#-*- coding:utf-8 -*-
import socket
import struct
import time
import win32api
import os
import re
def getTime(TimeServerAddresses):
TIME_1970 = 2208988800L
client = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
client.settimeout(3)
data = '\x1b' + 47 * '\0'
#TimeServer_ip=socket.gethostbyname('cn.pool.ntp.org')
#TimeServer_ip='202.118.1.130'
Port=123
for address in TimeServerAddresses:
success=False
count=0
while not success and count<3:
print address,count
try:
client.sendto(data, (address, Port))
data, address = client.recvfrom(1024)
success=True
except socket.timeout:
print 'Request timed out!'
count=count+1
if success==True:a
break
data_result = struct.unpack('!12I', data)[10]
data_result -= TIME_1970
return data_result
def setSystemTime(now_time):
tm_year, tm_mon, tm_mday, tm_hour, tm_min, tm_sec, tm_wday, tm_yday, tm_isdst = time.gmtime(now_time)
win32api.SetSystemTime(tm_year, tm_mon, tm_wday, tm_mday, tm_hour, tm_min, tm_sec, 0)
print "Set System OK!"
def getServerIP():
res1=os.popen('nslookup cn.pool.ntp.org')
result1=res1.read()
addresses=result1.split('\n\n')[1].split('\n')[1][12:].split(',')
return addresses
#for address in addresses:
# res=os.popen('ping -n 2 '+address)
# result=res.read()
# received_num=int(re.findall('Received = [0-9]',result)[0].split('=')[1])
# if received_num > 1:
# break
#TimeServer=address
if __name__ == '__main__':
addresses=getServerIP()
now_time=getTime(addresses)
setSystemTime(now_time)
print "%d-%d-%d %d:%d:%d" % time.localtime(now_time)[:6]
以上就是本文的全部内容，希望对大家的学习有所帮助。