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Full Discussion: CSV File parse help in Perl
Top Forums Shell Programming and Scripting CSV File parse help in Perl Post 302179964 by lodey on Saturday 29th of March 2008 08:06:16 AM
Old 03-29-2008
CSV File parse help in Perl
Folks,

I have a bit of an issue trying to obtain some data from a csv file using PERL. I can sort the file and remove any duplicates leaving only 4 or 5 rows containing data. My problem is that the data contained in the original file contains a lot more columns and when I try ro run this script it finds that all the data is unique.

I have the following fields within the orignal file:
PROGRAM ID,OP,PROBE_CARD ,DEVREVSTEP,TEST_START,TESTER_ID

The data which I need to obtain and sort is within the op,probecard and tester_id fields.

How can I go about this?

The code that I use after manually deleting the fields that i do not require is as follows:

Code:
#!/usr/bin/perl -w
use strict;
my $csvfile = 'probecards.csv';
my $newfile = 'sorted.csv';
my $fieldnames = 1;
open (IN, "<$csvfile")  or die "Couldn't open input CSV file: $!";
open (OUT, ">$newfile") or die "Couldn't open output file: $!";
my $header;
$header = <IN> if $fieldnames;
my @data = sort <IN>;
print OUT $header;
my $n = 0;
my $lastline = '';
foreach my $currentline (@data) {
  next if $currentline eq $lastline;
  print OUT $currentline;
  $lastline = $currentline;
  $n++;
}
close IN; close OUT;
print "Processing complete. In = " . scalar @data . " records, Out = $n records\n";

Sample CSV File:
Code:
Original File:

PROGRAM	ID	OP	PROBE_CARD	DEVREVSTEP	TEST_START	TESTER_ID
12630M196	139	2660	S25E3N36	88BCRA	16/03/2008 12:05	IN01
12630M196	1	2660	S25E3N36	88BLBHD	16/03/2008 13:04	IN04
12630M196	508	2660	S25E3N36	88BCRA	16/03/2008 13:41	IN01
12630M196	437	2660	S25E3N36	88CLNHC	16/03/2008 14:18	IN01
12630M196	465	2660	S25E3N36	88BCRA	16/03/2008 15:34	IN02
12630M196	27	2660	S25E3N36	88BCRA	16/03/2008 18:00	IN01
12630M196	18	2660	S25E3N36	88BCRA	16/03/2008 19:03	IN03


Output:

OPERATION PROBE_CARD_ID	TESTER_ID
2660	S25E3N21	IN04
2660	S25E3N27	IN02
2660	S25E3N36	IN01
2660	S25E3N39	IN03
2660	S25E3N40	IN04

Any pointers on how I could go about this would be greatly appreciated..

Rgds

Colin
 

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LEARN ABOUT CENTOS

processcsv.py

PROCESSCSV.PY(1)					      Virtualization Support						  PROCESSCSV.PY(1)

NAME

       processcsv.py - process virt-top CSV files

SUMMARY

	virt-top --csv data.csv
	processcsv.py < data.csv

DESCRIPTION

       virt-top is a top(1)-like utility for showing stats of virtualized domains.

       processcsv.py is a simple Python script that post-processes the output of "virt-top --csv".

       It is used like this:

	virt-top --csv data.csv
	processcsv.py < data.csv

       The second command will overwrite the following files in the current directory:

       "global.csv"
	   This contains the global (host) statistics columns from the CSV file.

       "domainNN.csv" (multiple files)
	   For each libvirt domain ID NN, a file is created containing the per-domain statistics from the CSV file.

SEE ALSO

       virt-top(1)

AUTHORS

       Richard W.M. Jones <rjones @ redhat . com>

COPYRIGHT

       (C) Copyright 2007-2012 Red Hat Inc., Richard W.M. Jones http://libvirt.org/

       This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by
       the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

       This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation,
       Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

virt-top-1.0.8							    2013-12-29							  PROCESSCSV.PY(1)
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