Parse Json using perl

user786 has asked for the wisdom of the Perl Monks concerning the following question:

I want to parse the following json output :

My script executes a command and the command provides the json output

im using perl json module.

the output looks like below


[
    {
       "wan" : 0,
       "lan" : 0,
       "name" : "HTTP",
       "wan1" : 0,
       "lan1" : 0
    }
]
[download]

From my test script ,when i pass 'wan1' as argument i need to get 0 as the output


use stricts;
use warning;
use json;

# function :

sub get_stats {

    my ($self,$option)  = @_;

    my $cmd     = 'cmd';     #command goes here

    $self->execute($cmd);

     #$self->output()  contains the  json output.

    my $decoded = decode_json($self->output() );


    my @out = @{ $decoded->{$self->output()} };
   
    foreach my $line ($self->output( ) );
  
    print $line -> {$option} . "\n" ;

}
[download]

Function call


$self->{'stats_obj'} = Statistics->new( ip => "ip addr");

 my $result = $self->{'stats_obj'}->get_stats('wan');
       INFO('Status of the task is :' . $result );
[download]

When the script executes it doesn't return anything. any suggestions please

Comment on Parse Json using perl Select or Download Code

Replies are listed 'Best First'.
Re: Parse Json using perl by MidLifeXis (Monsignor) on May 21, 2015 at 16:00 UTC
`use json` is not the same as `use JSON`. Case matters to the Perl language. --MidLifeXis	[reply] [d/l] [select]
Re: Parse Json using perl by Corion (Patriarch) on May 21, 2015 at 16:01 UTC
`use json;` [download] There is no such module. Maybe you meant: `use JSON;` [download] To proceed further, you should print out the string you have in `$self->output()` and verify that it matches what you expect. Then you should inspect the output of `print Dumper $decoded;`	[reply] [d/l] [select]
Re: Parse Json using perl by GrandFather (Saint) on May 22, 2015 at 11:26 UTC
When I run what you claim is your script I get: `Can't locate stricts.pm in @INC (you may need to install the stricts m +odule) (@INC contains: C:\Program Files (x86)\ActiveState Komodo IDE +8\lib\support\dbgp\perllib c:/strawberry/perl/site/lib c:/strawberry/ +perl/vendor/lib c:/strawberry/perl/lib .) at noname.pl line 2. BEGIN failed--compilation aborted at noname.pl line 2.` [download] So either you haven't told us what your output really was, or the code you published isn't the code you ran. Perl is the programming world's equivalent of English	[reply] [d/l]


laziness, impatience, and hubris
	PerlMonks