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Date: Wed, 29 Apr 2015 22:28:08 +0100
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Subject: Re: Python re to extract useful information from each line
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Xref: csiph.com comp.lang.python:89579

On 2015-04-29 22:22, Emile van Sebille wrote:
> On 4/29/2015 1:49 PM, Kashif Rana wrote:
>> pol_elements = re.compile('id\s(?P<p_id>.+?)(?:\sname\s(?P<p_name>.+?))?\sfrom\s(?P<p_from>.+?)\sto\s(?P<p_to>.+?)\s{2}(?P<p_src>[^\s]+?)\s(?P<p_dst>[^\s]+?)\s(?P<p_port>[^\s]+?)(?:(?P<p_nat_status>\snat)\s(?P<p_nat_type>[^\s]+?)(?P<p_nat_ip>\sdip-id\s[^\s]+?)?)?\s(?P<p_action>[^\s]+?)(?:\sschedule\s(?P<p_schedule>[^\s]+?))?(?P<p_log_status>\slog)?$'
>> )
>
>
> ... and that's why we avoid regular expressions... it makes my head hurt
> just looking at that line noise.
>
It might just be easier to split it into a list of fields and then pick
out the ones you want:

fields = re.findall(r'"[^"]+"|\S+', line)