python-扫描某一网段下的ip

 #!/usr/bin/env python
 #-*- coding:utf-8 -*-
 ############################
 #File Name: ipscaner.py
 #Author: frank
 #Mail: [e-mail]
 #Created Time:2017-06-05 16:06:37
 ############################

 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()),
            "", 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):
     for i in range(1,255):
         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 = "192.168.1.1"
     args = "".join(commandargs)    

     ip_prefix = '.'.join(args.split('.')[:-1])
     find_ip(ip_prefix)
     print "end time %s"%time.ctime()