如何获得逐行打印的telnet输出？

Question

我已经实现了一个脚本，该脚本连接到Cisco设备并收集show run输出。

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

题

有没有一种方法可以更改脚本，以使输出逐行显示？

Answer 1

Telnet.read_very_eager的文档对 Telnet.read_very_eager不太清楚，但它提到它为其他方法读写bytes 。 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。

Answer 2

您需要使用一些常见的特殊字符来检查字符串，这些特殊字符使用python split（）函数将各行分隔开，然后使用变量长度启动for循环，然后进行打印。