python调用Telnetlib配置完最后一个交换机总是报错

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

# In[1]:


#/usr/bin/env python3
from telnetlib import Telnet
import re,time,datetime,os
from threading import Thread
import xlrd

# In[2]:

# 华为设备执行命令函数
def execute_hw(address):
    account="csiaadmin"
    password="qweR%9527"
    tn = Telnet(address)
    tn.read_until(b"Username:", timeout=None)
    tn.write(account.encode()+b'\n')
    tn.read_until(b"Password:", timeout=None)
    tn.write(password.encode()+b'\n')
    tn.write(b"sys"+b'\n')
    tn.write(b"dhcp enable " + b'\n')
    tn.write(b"dhcp snooping enable " + b'\n')
    tn.write(b"port-group 1" + b'\n')
    tn.write(b"group-member GigabitEthernet0/0/1 to GigabitEthernet0/0/48" + b'\n')
    tn.write(b"dhcp snooping enable " + b'\n')
    time.sleep(2)
    tn.write(b"quit" + b'\n')
    tn.write(b"quit" + b'\n')
    tn.write(b"save" + b'\n')
    tn.write(b"y" + b'\n')
    time.sleep(2)
    tn.write(b"quit" + b'\n')
    tn.close()
    print(address)

if __name__ == '__main__':
    ff = open('jiaohuanji.txt', 'r')
    for line in ff.readlines():
        ipp = line.strip()
        execute_hw(ipp)
    ff.close()

写了一个特别简单的python代码，通过来Telnetlib模块来批量配置华为交换机，但是每次配置完最后一个交换机，就会弹出以下错误

Traceback (most recent call last):
  File "C:/Users/Administrator/Desktop/xl/caiji/beifen/peizhi.py", line 56, in <module>
    execute_hw(ipp)
  File "C:/Users/Administrator/Desktop/xl/caiji/beifen/peizhi.py", line 30, in execute_hw
    tn = Telnet(address)
  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python38\lib\telnetlib.py", line 218, in __init__
    self.open(host, port, timeout)
  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python38\lib\telnetlib.py", line 235, in open
    self.sock = socket.create_connection((host, port), timeout)
  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python38\lib\socket.py", line 808, in create_connection
    raise err
  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python38\lib\socket.py", line 796, in create_connection
    sock.connect(sa)
ConnectionRefusedError: [WinError 10061] 由于目标计算机积极拒绝，无法连接。

ConnectionRefusedError: [WinError 10061] 由于目标计算机积极拒绝，无法连接。这个报错是你的socket断开了，你试试将  tn.close()去掉

您好，我是有问必答小助手，您的问题已经有小伙伴解答了，您看下是否解决，可以追评进行沟通哦~

如果有您比较满意的答案 / 帮您提供解决思路的答案，可以点击【采纳】按钮，给回答的小伙伴一些鼓励哦～～

ps:问答VIP仅需29元，即可享受5次/月 有问必答服务，了解详情>>>https://vip.csdn.net/askvip?utm_source=1146287632

您好，我是有问必答小助手，您的问题已经有小伙伴帮您解答，感谢您对有问必答的支持与关注！
PS：问答VIP年卡 【限时加赠：IT技术图书免费领】，了解详情>>> https://vip.csdn.net/askvip?utm_source=1146287632