How to export single table row

dsmart00

I have been looking to try exporting a single selected table row, however looking through the documentation there is on tableTools which shoudn't be used.

    $('#port-a').DataTable({
        dom: 'Bfrtip',
        buttons: [
            'copy', 'csv', 'excel', 'pdf', 'print'
        ],
        select: true
    });

What do i need to do?