with os.popen("ipconfig /all") as res:

    for line in res:

        line = line.strip()

        if line.startswith("IPv4"):

            ipv4 = map(int, re.findall("(\d+)\.(\d+)\.(\d+)\.(\d+)", line)[0])

        elif line.startswith("子网掩码"):

            mask = map(int, re.findall("(\d+)\.(\d+)\.(\d+)\.(\d+)", line)[0])

            break

net_segment = ".".join([str(i & j) for i, j in zip(ipv4, mask)]).strip(".0")

net_segment

with os.popen("ipconfig /all") as res:

    for line in res:

        line = line.strip()

        if line.startswith("IPv4"):

            net_segment = re.findall("(\d+\.\d+\.\d+)\.\d+", line)[0]

            break

net_segment

import os

import re

import time

from concurrent.futures import ThreadPoolExecutor, wait, ALL_COMPLETED

import pandas as pd

def get_net_segment():

    with os.popen("arp -a") as res:

        for line in res:

            line = line.strip()

            if line.startswith("接口"):

                net_segment = re.findall(

                    "(\d+\.\d+\.\d+)\.\d+", line)[0]

                break

    return net_segment

def ping_net_segment_all(net_segment):

    # for i in range(1, 255):

    #     os.system(f"ping -w 1 -n 1 {net_segment}.{i}")

    with ThreadPoolExecutor(max_workers=4) as executor:

        for i in range(1, 255):

            executor.submit(os.popen, f"ping -w 1 -n 1 {net_segment}.{i}")

def get_arp_ip_mac():

    header = None

    with os.popen("arp -a") as res:

        for line in res:

            line = line.strip()

            if not line or line.startswith("接口"):

                continue

            if header is None:

                header = re.split(" {2,}", line.strip())

                break

        df = pd.read_csv(res, sep=" {2,}",

                         names=header, header=0, engine='python')

    return df

def ping_ip_list(ips, max_workers=4):

    print("正在扫描在线列表")

    with ThreadPoolExecutor(max_workers=max_workers) as executor:

        future_tasks = []

        for ip in ips:

            future_tasks.append(executor.submit(os.popen, f"ping -w 1 -n 1 {ip}"))

        wait(future_tasks, return_when=ALL_COMPLETED)

if __name__ == '__main__':

    # 是否进行初始扫描

    init_search = False

    if init_search:

        print("正在扫描当前网段所有ip，预计耗时1分钟....")

        ping_net_segment_all(get_net_segment())

    last = None

    while 1:

        df = get_arp_ip_mac()

        df = df.loc[df.类型 == "动态", ["Internet 地址", "物理地址"]]

        if last is None:

            print("当前在线的设备：")

            print(df)

        else:

            online = df.loc[~df.物理地址.isin(last.物理地址)]

            if online.shape[0] > 0:

                print("新上线设备：")

                print(online)

            offline = last[~last.物理地址.isin(df.物理地址)]

            if offline.shape[0] > 0:

                print("刚下线设备：")

                print(offline)

        time.sleep(5)

        ping_ip_list(df["Internet 地址"].values)

        last = df

当前在线的设备：

     Internet 地址               物理地址

0    192.168.3.3  3c-7c-3f-83-e2-7c

1   192.168.3.10  3c-7c-3f-80-08-1b

2   192.168.3.25  f0-2f-74-82-15-7e

3   192.168.3.26  f0-2f-74-82-15-a2

4   192.168.3.28  f0-2f-74-82-15-38

5   192.168.3.29  f0-2f-74-82-15-d0

6   192.168.3.32  f0-2f-74-82-15-3b

7   192.168.3.33  f0-2f-74-82-15-56

8   192.168.3.39  a8-5e-45-16-79-99

9  192.168.3.225  30-24-a9-5a-eb-82

新上线设备：

    Internet 地址               物理地址

9  192.168.3.52  3c-7c-3f-c2-cd-cb

刚下线设备：

    Internet 地址               物理地址

9  192.168.3.52  3c-7c-3f-c2-cd-cb