python之如何逐行打印 telnet 输出

我已经实现了一个连接到 Cisco 设备并收集 show run 输出的脚本。

脚本是:

import getpass 
import telnetlib 
import time 
 
 
HOST = "10.62.149.9" 
user = input("Enter your remote account: ") 
password = getpass.getpass("User Password: ") 
enable = getpass.getpass("Enable Password: ") 
 
tn = telnetlib.Telnet(HOST) 
 
tn.read_until(b"Username: ") 
tn.write(user.encode('ascii') + b"\n") 
if password: 
    tn.read_until(b"Password: ") 
    tn.write(password.encode('ascii') + b"\n") 
tn.write(b"enable\n") 
if enable: 
    tn.read_until(b"Password: ") 
    tn.write(enable.encode('ascii') + b"\n") 
tn.write(b"term len 0\n") 
tn.write(b"show run\n") 
time.sleep(10) 
s = tn.read_very_eager() 
print (s) 
tn.close() 

脚本输出为:

\r\ninterface GigabitEthernet1/0/26\r\n!\r\ninterface GigabitEthernet1/0/27\r\n!\r\ninterface GigabitEthernet1/0/28\r\n!\r\ninterface GigabitEthernet1/0/29\r\n!\r\ninterface GigabitEthernet1/0/30\r\n!\r\ninterface GigabitEthernet1/0/31\r\n!\r\ninterface GigabitEthernet1/0/32\r\n!\r\ninterface GigabitEthernet1/0/33\r\n!\r\ninterface GigabitEthernet1/0/34\r\n!\r\ninterface GigabitEthernet1/0/35\r\n!\r\ninterface GigabitEthernet1/0/36\r\n!\r\ninterface GigabitEthernet1/0/37\r\n!\r\ninterface GigabitEthernet1/0/38\r\n!\r\ninterface GigabitEthernet1/0/39\r\n!\r\ninterface GigabitEthernet1/0/40\r\n!\r\ninterface GigabitEthernet1/0/41\r\n!\r\ninterface GigabitEthernet1/0/42\r\n!\r\ninterface GigabitEthernet1/0/43\r\n!\r\ninterface GigabitEthernet1/0/44\r\n!\r\ninterface GigabitEthernet1/0/45\r\n!\r\ninterface GigabitEthernet1/0/46\r\n!\r\ninterface GigabitEthernet1/0/47\r\n!\r\ninterface GigabitEthernet1/0/48\r\n no switchport\r\n ip address 10.62.149.9 
255.255.255.128\r\n!\r\ninterface GigabitEthernet1/0/49\r\n!\r\ninterface GigabitEthernet1/0/50\r\n!\r\ninterface GigabitEthernet1/0/51\r\n!\r\ninterface GigabitEthernet1/0/52\r\n!\r\ninterface Vlan1\r\n no ip address\r\n shutdown\r\n!\r\ninterface Vlan10\r\n ip address 10.10.10.1 
255.255.255.0\r\n!\r\ninterface Vlan199\r\n ip address 217.21.0.6 255.255.254.0\r\n no ip redirects\r\n ip ospf priority 100\r\n!\r\ninterface Vlan777\r\n ip address 7.7.7.1 

问题

有没有办法更改脚本，以便逐行显示输出？

请您参考如下方法:

documentation for telnetlib对Telnet.read_very_eager不是很清楚，但它提到它读写bytes用于其他方法。 type(s) 可能是 bytes。

使用bytes.decode获取字符串:print(s.decode('ascii'))(使用适当的编码)

注意:这是针对 Python 3 的。