How to use the prophyle.tree_print_fasta_names.TreeIndex function in prophyle

fastas_fn = node.fastapath.split("@")
                for fasta_fn in fastas_fn:
                    print(fasta_fn)

        else:
            children = node.get_children()

            for child in children:
                self.process_node(child)


if __name__ == "__main__":
    assert (len(sys.argv) == 2)
    newick_fn = sys.argv[1]

    ti = TreeIndex(tree_newick_fn=newick_fn, )
    ti.process_node(ti.tree.get_tree_root())