Python獲取指定網段正在使用的IP

#!/usr/bin/env python
# -*- coding: utf-8 -*-


''''' 
使用方法樣例 python test20.py 192.168.1.1  
(會掃描192.168.1.1-255的ip) 
多執行緒加速後大概十幾秒
'''
import platform
import sys
import os
import time
import threading

live_ip = 0


def get_os():
    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()
    for line in output:
        if str(line).upper().find("TTL") >= 0:
            print("ip: %s is ok ***" % ip_str)
            
 
global live_ip
            live_ip += 1
            break


def find_ip(ip_prefix):
    '''''
    給出當前的127.0.0 ，然後掃描整個段所有地址
    '''
    threads = []
    for i in range(1, 256):
        ip = '%s.%s' % (ip_prefix, i)
        threads.append(threading.Thread(target=ping_ip, args={ip, }))
    for i in threads:
        i.start()
    
 
for i in threads:
        i.join()


if __name__ == "__main__":
    print("start time %s" % time.ctime())
    cmd_args = sys.argv[1:]
    args = "".join(cmd_args)
    ip_pre = '.'.join(args.split('.')[:-1])
    find_ip(ip_pre)
    print("end time %s" % time.ctime())
    print('本次掃描共檢測到本網路存在%s臺裝置' % live_ip)