package MySelf;

my $var='Hello';
sub world { 'World' };

DWIM();
my::world(); # Calls the World function from this package
NotMe::planet(); # Sees my::world but not $var
unDWIM();
##</code><code>##

package MySelf;

package Ext 
{ 
    use Data::Dumper;
    use Text::CSV qw( csv );
};

Ext::Dumper(Ext::csv(in => "data.csv"));