* Nick Stinemates <n...@stinemates.org> [2009-11-17 13:30:51 -0500]:
> Date: Tue, 17 Nov 2009 13:30:51 -0500
> From: Nick Stinemates <n...@stinemates.org>
> To: Antonio de la Fuente <t...@muybien.org>
> Cc: Python Tutor mailing list <tutor@python.org>
> Subject: Re: [Tutor] Introduction - log exercise
> Mail-Followup-To: Antonio de la Fuente <t...@muybien.org>,
> Python Tutor mailing list <tutor@python.org>
> User-Agent: Mutt/1.5.20 (2009-06-14)
> Message-ID: <20091117183051.ga20...@stinemates.org>
>
> > I will read lines from file, with the 'for loop', and then I will check
> > them for
> > 'foo' matches with a 'while loop', if matches I (somehow) re-initialise the
> > list, and if there is no matches for foo, I will append line to the list.
> > When I
> > get to a blank line (end of block), write myList to an external file. And
> > start
>
> Can you please explain what you mean by _re-initialize the list_ ?
>
By re-initialize the list I was thinking to get rid of the lines that
have been put into it, until it has been found one with 'foo', if not
it will contaminated the new log file, with lines from blocks that had
'foo' lines.
> > with another line.
> >
> > I am stuck with defining 'blank line', I don't manage to get throught the
> > while
> > loop, any hint here I will really appreciate it.
> > I don't expect the solution, as I think this is a great exercise to get wet
> > with python, but if anyone thinks that this is the wrong way of solving the
> > problem, please let me know.
> >
> >
>
> Can you explain why the following won't work?
>
Because I don't know how to define a blank line, that will allow me to
differentiate between blocks.
>
> #!/usr/bin/python
>
> import sys
> import gzip
> # At the moment not bother with argument part as I am testing it with a
> # testing log file
> #fileIn = gzip.open(sys.argv[1])
>
> fileIn = gzip.open('big_log_file.gz', 'r')
> fileOut = open('outputFile', 'a')
>
> for line in fileIn:
> while line != 'blank_line':
> if 'foo' not in line:
> fileOut.write(line)
[...]
--
-----------------------------
Antonio de la Fuente Martínez
E-mail: t...@muybien.org
-----------------------------
El que con niños se acuesta, mojado se levanta.
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