Re: [Pyparsing] parsing and extracting tac_plus.conf user data

[Paul M. <pt...@au...>]

Pyparsing only reports one because you only told it to get one.  Change to:

    result = OneOrMore(expr).parseString(data).asList()

and you'll process the rest of the file too.

Also, you will find your results easier to process if you wrap expr in a
Group, as in:

    expr = Group(Word(alphas) + '=' + Word(alphanums) +
Optional(nestedCurlies))

-- Paul


-----Original Message-----
From: Asif Iqbal [mailto:va...@gm...] 
Sent: Sunday, May 25, 2014 12:08 AM
To: pyp...@li...
Subject: [Pyparsing] parsing and extracting tac_plus.conf user data

Hi All,

I am trying to use pyparse to extract user data and it only picks up the
first block.

Any idea what I am doing wrong? I am using python 2.7.6 on ubuntu trusty

#!/usr/bin/python
import pprint, sys
#from pyparsing import Word, Literal, Forward, Group, ZeroOrMore, alphas
from pyparsing import *

f = sys.argv[1]

data = open(f,'r').read()

nestedCurlies = nestedExpr('{','}')

expr = Word(alphas) + '=' + Word(alphanums) + Optional(nestedCurlies)

expr.ignore("#" + restOfLine)
result = expr.parseString(data).asList()

pprint.pprint(result)

Here is sample data file:

user = aa06591 {
        pap = PAM
        login = PAM
    member = readonly

    ## temporary commands so John can adjust resolver
    ## uplink speed/duplex on SVCS routers

    cmd = interface {
        permit "Ethernet"
        deny .*
    }

    cmd = speed {
        permit .*
    }
    cmd = duplex {
        permit .*
    }
    cmd = default {
        permit speed
        permit duplex
        deny .*
    }
    cmd = write {
        deny ^erase
        permit .*
    }
}
user = lukesd {
        pap = des 11uGIcdXQ6v9E
        login = file /etc/tacacs-passwd
        member = readonly
}
user = curryc {
    pap = PAM
        login = PAM
        member = implementation
}
user = rhodesw {
        pap = PAM
        login = PAM
        member = implementation
}
user = aa68442 {
        pap = PAM
        login = PAM
        member = implementation
}
user = jdimayu {
        pap = PAM
        login = PAM
    member = readonly
}


Here is the output, and it only displays the first block

['user',
 '=',
 'aa60591',
 ['pap',
  '=',
  'PAM',
  'login',
  '=',
  'PAM',
  'member',
  '=',
  'readonly',
  'cmd',
  '=',
  'interface',
  ['permit', '"Ethernet"', 'deny', '.*'],
  'cmd',
  '=',
  'speed',
  ['permit', '.*'],
  'cmd',
  '=',
  'duplex',
  ['permit', '.*'],
  'cmd',
  '=',
  'default',
  ['permit', 'speed', 'permit', 'duplex', 'deny', '.*'],
  'cmd',
  '=',
  'write',
  ['deny', '^erase', 'permit', '.*']]]


 --
Asif Iqbal
PGP Key: 0xE62693C5 KeyServer: pgp.mit.edu
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
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