ping command

Descripton :
Use ping to ping other computer.
Make sure it is alive.

Design method :

      
                                               +------+
                                               | ping |
                                               |      |
                                               +------+
                                                  |
                                                  |
                                                  |   
                                                  V
                                          +------------+
               +------------------------->|read command|
               |                          +------------+
               |                                  |
               |                                  |
               |                                  |
               |                                  |
               |                                  |
            +-----+                               |
            |  B  |<------------------------------+                
            |     |
            +-----+
               |     
               |
               |                 +-------------+  
               +---------------->| print Result|  
                                 +-------------+
 
comment :
B - determine (0,1,2) how many received
    If know how many number do we got.
    Then print result.
    Ping next address.

Code :

import os
import re
import time
import sys

lifeline = re.compile(r"(\d) received")
report = ("No response","Partial Response","Alive")

print time.ctime()

for host in range(1,10):
   ip = "168.95.1."+str(host)
   pingaling = os.popen("ping -q -c2 "+ip,"r")
   print "Testing ",ip,
   sys.stdout.flush()
   while 1:
      line = pingaling.readline()
      print line
      print 'flag 1'
      if not line: 
         print 'flag 2'
         break
      igot = re.findall(lifeline,line)
      print igot
      if igot:
           print report[int(igot[0])]

print time.ctime()

Reference :

1. http://www.wellho.net/solutions/python-python-threads-a-first-example.html