Question

我从LAN交换机获得了一些信息，如下所示

Vlan 1 is administratively down, line protocol is down  
Vlan 2 is up, line protocol is up  
  Helper address is 192.168.0.2  
Vlan 3 is up, line protocol is up  
  Helper address is not set  
Vlan 4 is up, line protocol is up  
  Helper address is 192.168.0.2  
Vlan 5 is down, line protocol is down  
  Helper address is 192.168.0.2  
Vlan 6 is down, line protocol is down  
  Helper address is not set  
  Helper address is not set

我正在尝试的输出是

Vlan 1,admin down,n/a
Vlan 2,up/up, 192.168.0.2
Vlan 3, up/up, not set
Vlan 4, up/up, 192.168.0.2
Vlan 5, down/down, 192.168.0.2
Vlan 6, down/down, not set

所以助手并不总是在那里（第1行）有时它的设置有时它不是，有时候有两行（最后一个Vlan - 我只需要1个）

并且Vlan可以具有admin down，up / up，up / down（不是这里）和down down状态。

所以使用Python和pexpect我可以获得上面的输出，但是我在解析连续的行时遇到了困难。我已经尝试枚举，然后使用键+ 1作为下一行，但事实是Vlan后面可能有0或2行螺丝我。有什么想法吗？

Answer 1

import re

x="""
Vlan 1 is administratively down, line protocol is down  
Vlan 2 is up, line protocol is up  
  Helper address is 192.168.0.2  
Vlan 3 is up, line protocol is up  
  Helper address is not set  
Vlan 4 is up, line protocol is up  
  Helper address is 192.168.0.2  
Vlan 5 is down, line protocol is down  
  Helper address is 192.168.0.2  
Vlan 6 is down, line protocol is down  
  Helper address is not set  
  Helper address is not set
"""

x=x.replace(" is administratively down, line protocol is down  ",", admin down, n/a")
x=x.replace(" line protocol is ","")
x=x.replace(" is down,",", down/")
x=x.replace(" is up,",", up/")
x=re.sub("(?:\s*Helper address is (.*))+",", \\1",x)

print x

Vlan 1, admin down, n/a
Vlan 2, up/up, 192.168.0.2
Vlan 3, up/up, not set
Vlan 4, up/up, 192.168.0.2
Vlan 5, down/down, 192.168.0.2
Vlan 6, down/down, not set

Answer 2

区分感兴趣的行（以'Vlan'开头;或不是）：

for line in lines:
    if line.startswith("Vlan"):
        # parse Vlanline
        # ...
    else:
        # parse data from helper line
        # ...

Answer 3

这是一种方式，

import re    
data=open("file").read()
r=re.split("\n[^ \t]+",data)
for i in r:
  print "-->",i.split("\n")

$ ./python.py
--> ['Vlan 1 is administratively down, line protocol is down  ']
--> [' 2 is up, line protocol is up  ', '  Helper address is 192.168.0.2  ']
--> [' 3 is up, line protocol is up  ', '  Helper address is not set  ']
--> [' 4 is up, line protocol is up  ', '  Helper address is 192.168.0.2  ']
--> [' 5 is down, line protocol is down  ', '  Helper address is 192.168.0.2  ']
--> [' 6 is down, line protocol is down  ', '  Helper address is not set  ', '  Helper address is not set', '']

现在您可以操作每个项目，因为它们已经组合在一起

Answer 4

ghostdog给了我一个解决方案的线索

首先，我将表枚举成字典然后一步一步。如果该行以VLAN开头，那么我可以测试行+ 1等以查看它是否是帮助行

然后将它们全部输出为一行并根据需要将其切片

不是最干净的方式，但是工作并感谢所有人的帮助

从开关输出中提取python

4 个答案: