python 批量ping一个网段 返回结果 的程序

import subprocess
import threading
import time
import re

ip_num = 256
list_ping_result = []

class PingThread(threading.Thread):

def __init__(self,str_ip,sleep_time,g_list_p_r):
threading.Thread.__init__(self)
self.sleep_time = sleep_time
self.str_ip = str_ip
self.list_p_r = g_list_p_r
def run(self):
time.sleep(self.sleep_time)
ftp_sub = subprocess.Popen("ping %s -n 3" % self.str_ip,
stdin=subprocess.PIPE, stdout=subprocess.PIPE, shell=True)
ret = ftp_sub.stdout.read()
str_ret = ret.decode("gbk")
ret_s = re.search("TTL",str_ret)
if ret_s:
self.list_p_r.append(('ping    ok',self.str_ip))
else:
self.list_p_r.append(('ping error',self.str_ip))

def cmp_s(toupe_str):
str_val = toupe_str[1]
ret_group = re.match("\d*",str_val[::-1])
str_ret = ret_group.group()
return int(str_ret[::-1])

thread_id =[]
for i in range(ip_num):
thread_id.append(0)
thread_id[i] = PingThread("192.168.8.%d" % i, int(i/20),list_ping_result)
thread_id[i].start()
print(i,end='')

while True:
if len(list_ping_result) >= ip_num:
list_ping_result.sort(key=cmp_s)
for i in list_ping_result:
print(i)

break