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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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DESCRIPTION

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EXAMPLES

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OPTIONS

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	      collection to use

       -q, --query QUERY
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