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08.01.2008 at 09:25PM PDT, ID: 23615822
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9.3

using regular expression to match IP addresses

Asked by summer_soccer in Python Scripting Language

Tags:

I wrote some code to parse a plain text file and find all IP addresses in the file.

When I wrote:


it outputs:

one line is   2  kc1-teng1-2.net.ohio-state.edu (164.107.2.149)  0.770 ms * *
the ip addresses are  ['164.107.2.149']

but when I wrote:

   for line in tfile:
                print 'one line is ', line
                all = re.findall("(\d{1,3}\.){3}\d{1,3}",line)  ## match IP address
                print 'the ip addresses are ', all

and the output becomes:

one line is  traceroute to 190.66.210.154 (190.66.210.154), 30 hops max, 40 byte packets

the ip addresses are  ['210.', '210.']


I want to know, what's the difference between using
 all = re.findall("(?:\d{1,3}\.){3}\d{1,3}",line)  
and
 all = re.findall("(\d{1,3}\.){3}\d{1,3}",line)
?
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tfile = open('./tmp/'+tracefile, 'r') 
            for line in tfile: 
                print 'one line is ', line
                all = re.findall("(?:\d{1,3}\.){3}\d{1,3}",line)  ## match IP address
                print 'the ip addresses are ', all
 
 
 
   for line in tfile: 
                print 'one line is ', line
                all = re.findall("(\d{1,3}\.){3}\d{1,3}",line)  ## match IP address
                print 'the ip addresses are ', all
 
Keywords: using regular expression to match IP ad…
Title
1 traceroute - hops
2 traceroute
3 traceroute?
4 traceroute log  [URGENT]
5 IPTABLES and TRACEROUTE
6 Can you force the PIX to show as hop i…
 
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[+][-]08.02.2008 at 07:26PM PDT, ID: 22146266

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About this solution

Zone: Python Scripting Language
Tags: python
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Solution Provided By: ramrom
Participating Experts: 2
Solution Grade: A
 
 
[+][-]08.04.2008 at 10:33PM PDT, ID: 22158370

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