Ping检查服务器网络

#!/usr/bin/python
#coding:utf-8
import multiprocessing
import re
import sys,os
import commands
import datetime
def  pinger(ip):
cmd='ping -c 2 %s' % (ip.strip())  #Return a copy of the string S with leading and trailing whitespace removed.
ret = commands.getoutput(cmd)      #Return output (stdout or stderr) of executing cmd in a shell.
loss_re=re.compile(r"received, (.*) packet loss") #Compile a regular expression pattern, returning a pattern object.
packet_loss=loss_re.findall(ret)[0] 	#Return a list of all non-overlapping matches in the string
rtt_re=re.compile(r"rtt min/avg/max/mdev = (.*) ")
rtts=rtt_re.findall(ret)
#rtt.split(["/"])
rtt=rtts[0].split('/') #Return a list of the words in the string
rtt_min=rtt[0]
rtt_avg=rtt[1]
rtt_max=rtt[2]
print "%s\t\t%s\t\t%s\t\t%s\t\t%s"%(ip,packet_loss,rtt_min,rtt_max,rtt_avg)

if __name__ == "__main__":
if not os.path.exists("hosts.txt") :
print "\033[31mhosts.txt文件不存在，请重试\033[0m" #"\033[31m字符串\033[0m"设置颜色字体
sys.exit(1)
now=datetime.datetime.now()
file=open('hosts.txt','r')
pool=multiprocessing.Pool(processes=4)  #Returns a process pool object
result=[]
print "########%s###########"%now
print "IPADDRSS\t\t\tLOSS\t\tMIN\t\tMAX\t\tAVG"
for i in file.readlines():
if len(i)==1 or i.startswith("#"):
continue
result.append(pool.apply_async(pinger,(i.strip(),)))  #A variant of the apply() method which returns a result object.
pool.close()
pool.join()