python3 telnet socket.gaierror : [Errno 8] nodename nor servname provided, 或未知

我正在尝试通过 python3 脚本根据 hosts.txt 文件中的 ip 地址远程登录到路由器。但是我收到以下错误:

$ ./telnet_group_1.py   
10.1.1.1   
 Traceback (most recent call last):   
  File "./telnet_group_1.py", line 23, in <module>   
    tn = telnetlib.Telnet(host)   
  File "/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/telnetlib.py", line 209, in __init__   
    self.open(host, port, timeout)   
  File "/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/telnetlib.py", line 225, in open   
    self.sock = socket.create_connection((host, port), timeout)   
  File "/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/socket.py", line 386, in create_connection   
    for res in geta ddrinfo(host, port, 0, SOCK_STREAM):   
socket.gaierror: [Errno 8] nodename nor servname provided, or not known   

如果我使用相同的 ip 地址但在脚本中定义(不是从 hosts.txt 文件中获取)，则脚本可以正常工作。请告知如何更改代码以使其工作？

脚本细节:

import telnetlib, socket   
 
hosts = open("hosts.txt", 'r')   
output = open("output.txt", 'w')   
 
username = 'admin'   
password = 'admin'   
 
for h in hosts:   
    host_s = str(h)       
    tn = telnetlib.Telnet(host_s)   
    tn.read_until(b'Username: ')   
    tn.write(username.encode('ascii') + b"\n")   
    tn.read_until(b'Password: ')   
    tn.write(password.encode('ascii') + b"\n")   
    tn.write(b"terminal len 0\n")   
    tn.write(b"show version\n")   
    tn.write(b"exit\n")   
    print(tn.read_all().decode('ascii'), file = output)   

hosts.txt 目前只包含一个条目 - 只是为了让它工作:

10.1.1.1   

请您参考如下方法:

您想在 hosts 文件的行上使用 .strip()；否则包含换行符:

for h in hosts:   
    tn = telnetlib.Telnet(h.strip())