use Config::Inifiles;
use Data::Dumper;
my %ini;
tie %ini, 'Config::IniFiles', ( -file => "test.ini" );
print Dumper \%ini;
@hosts = keys %{$ini{'hosts'}};
@ips = values %{$ini{'hosts'}};
print Dumper \@hosts;
print Dumper \@ips;

##</code><code>##

$VAR1 = {
          'hosts' => {
                       'host_1' => '192.168.1.1',
                       'host_2' => '192.168.1.2',
                       'host_3' => '192.168.1.3'
                     }
        };
$VAR1 = [
          'host_1',
          'host_2',
          'host_3'
        ];
$VAR1 = [
          '192.168.1.1',
          '192.168.1.2',
          '192.168.1.3'
        ];