add to wooCommerce new attributes/attrs

Hello,
in wordpress 4.6 I need to add to wooCommerce new attributes/attrs with structure like

Array
(
    [attribute_id] => 1
    [attribute_name] => brand
    [attribute_label] => Brand
    [attribute_type] => select
    [attribute_orderby] => menu_order
    [attribute_public] => 0
    [attrs] => Array
        (
            [0] => Array
                (
                    [term_id] => 6
                    [name] => A4Tech
                    [slug] => a4tech
                    [term_group] => 0
                    [term_taxonomy_id] => 6
                    [taxonomy] => pa_brand
                    [description] => 
                    [parent] => 0
                    [count] => 4
                    [filter] => raw
                )

            [1] => Array
                (
                    [term_id] => 45
                    [name] => Firstblood
                    [slug] => firstblood
                    [term_group] => 0
                    [term_taxonomy_id] => 45
                    [taxonomy] => pa_brand
                    [description] => 
                    [parent] => 0
                    [count] => 5
                    [filter] => raw
                )

            [2] => Array
                (
                    [term_id] => 34
                    [name] => IBM
                    [slug] => ibm
                    [term_group] => 0
                    [term_taxonomy_id] => 34
                    [taxonomy] => pa_brand
                    [description] => 
                    [parent] => 0
                    [count] => 1
                    [filter] => raw
                )

I googled and found examples like :
$parent_term = term_exists( 'fruits', 'product' ); // array is returned if taxonomy is given
$parent_term_id = $parent_term['term_id'];         // get numeric term id
wp_insert_term(
    'Apple',   // the term 
    'product', // the taxonomy
    array(
        'description' => 'A yummy apple.',
        'slug'        => 'apple',
        'parent'      => $parent_term_id,
    )
);

I tried to make by this example, but failed : I am not still sure is this code for attribute / attr creation.
Could, you please, explaine or give link for example?

Thanks!