How to execute python code from perl program and use output of python code

Question

I want to execute python script from perl code. I want to save python output to array and get some data from it. Python script will do some search in disk and locate files which I need. I will use that output and play with it in my next script.

I wrote some code

use strict;
use warnings;
use Getopt::Long;
my $opt_section;
my $opt_content;
my $opt_ver;
my $opt_help = 0;

 &GetOptions (
"help"          => \$opt_help,
"section:s"        => \$opt_section,
"content:s"        => \$opt_content,
"ver:s"      => \$opt_ver,
);

if ($opt_help) {
print "USAGE: file.pl -section <section> -content <content> -ver <ver> \n ";

exit;}
###################python script stats here ################
 my $py = `/home/priya/library/bin/find.py -filter test~${opt_section}_priya_${opt_ver}` ;


    print "output is $py \n";

code is executing python script and displaying output on the terminal screen. But it is not storing output to $py. Can you please hep me to direct all output to an array or scalar? later I want to use every line of python output.

my @output = qx(... 2>&1) (qx() is same as backticks)

mpapec
– mpapec

2015-07-06 05:34:22 +00:00
Commented Jul 6, 2015 at 5:34 — mpapec
– mpapec, Commented Jul 6, 2015 at 5:34

nebulous · Accepted Answer · 2015-07-08 13:05:12Z

1

It appears as if find.py is outputting to STDERR. Try the following which redirects STDERR (filehandle 2) to STDOUT (filehandle 1) with 2>&1 and fills array @python_output with the resulting lines.

my @python_output = qx(/home/priya/library/bin/find.py -filter test~${opt_section}_priya_${opt_ver} 2>&1);

See http://perldoc.perl.org/perlop.html#qx%2f_STRING_%2f for several examples of how to wrangle STDERR and STDOUT in pipes.

answered Jul 8, 2015 at 13:05

nebulous

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