WooCommerce shortcode for 'Product attributes list'

// Get WooCommerce product attributes by ID via shortcode: [iw_product_attributes id='']
function iw_product_attributes_shortcode( $atts ) {
    $atts = shortcode_atts( array(
        'id'	=> null,
    ), $atts, 'bartag' );

    if( intval( $atts['id'] ) > 0 && function_exists( 'wc_get_product' ) ){
		$_product = wc_get_product( $atts['id'] );

		if( $_product->has_attributes() ){
			// Initializing
			$attributes = array(); 

			// Loop through product attributes
			foreach( $_product->get_attributes() as $taxonomy => $attribute ){
				// The product attribute label name
				$attribute_name = get_taxonomy( $taxonomy )->labels->singular_name;

				// Set each product attribute with its values in an array
				$attributes[] = '<li><span class="uk-text-uppercase uk-text-lead">' . $attribute_name . '</span><br />' . $_product->get_attribute($taxonomy) . '</li>';
			}

			// Display (output)
			return '<ul class="uk-list uk-list-divider">'. implode( $attributes ) . '</ul>';
		}
	}
}
add_shortcode( 'iw_product_attributes', 'iw_product_attributes_shortcode' );