Drupal 6 node.save uses different methods for saving taxonomy for different taxonomy types.
For multiple select based taxonomy:
(php)
$nodeObj->taxonomy = array(2=>array(15,19));
(python)
nodeOb['taxonomy']['2'] = [15,19]
For tags based taxonomy:
(php)
$nodeObj->taxonomy = array(
'tags' => array(
2=>'military,navy'
)
);
