Python实现扫描局域网活动ip（扫描在线电脑）

#-*- coding: utf-8 -*- 
#author: orangleliu date: 2014-11-12 
#python2.7.x ip_scaner.py 
 
''''' 
不同平台，实现对所在内网端的ip扫描 
 
有时候需要知道所在局域网的有效ip，但是又不想找特定的工具来扫描。 
使用方法 python ip_scaner.py 192.168.1.1 
(会扫描192.168.1.1-255的ip) 
''' 
 
import platform 
import sys 
import os 
import time 
import thread 
 
def get_os(): 
  ''''' 
  get os 类型 
  ''' 
  os = platform.system() 
  if os == "Windows": 
    return "n" 
  else: 
    return "c" 
   
def ping_ip(ip_str): 
  cmd = ["ping", "-{op}".format(op=get_os()), 
      "1", ip_str] 
  output = os.popen(" ".join(cmd)).readlines() 
   
  flag = False 
  for line in list(output): 
    if not line: 
      continue 
    if str(line).upper().find("TTL") >=0: 
      flag = True 
      break 
  if flag: 
    print "ip: %s is ok ***"%ip_str 
 
def find_ip(ip_prefix): 
  ''''' 
  给出当前的127.0.0 ，然后扫描整个段所有地址 
  ''' 
  for i in range(1,256): 
    ip = '%s.%s'%(ip_prefix,i) 
    thread.start_new_thread(ping_ip, (ip,)) 
    time.sleep(0.3) 
   
if __name__ == "__main__": 
  print "start time %s"%time.ctime() 
  commandargs = sys.argv[1:] 
  args = "".join(commandargs)   
   
  ip_prefix = '.'.join(args.split('.')[:-1]) 
  find_ip(ip_prefix) 
  print "end time %s"%time.ctime() 

D:\CodeHouse\python\tools>python ip_scaner.py 10.0.1.38 
start time Wed Nov 12 18:50:58 2014 
ip: 10.0.1.1 is ok *** 
ip: 10.0.1.2 is ok *** 
ip: 10.0.1.24 is ok *** 
ip: 10.0.1.38 is ok *** 
ip: 10.0.1.39 is ok *** 
end time Wed Nov 12 18:52:16 2014