Show Woocommerce custom attributes

<?php 
/**
 * Show Woocommerce custom attributes
 */

global $product;
	
$custom_attributes = array();

foreach ( $product->get_attributes() as $slug => $attr ) {
	$custom_attributes[] = $slug;
}
// This is fine for attributes set in Woocommerce > Attributes
// but not for attributes set in product editing screen
foreach ($custom_attributes as $custom_attribute) {
	$many_values = array();
	foreach ( get_the_terms( $product->id, $custom_attribute) as $attr ) {
		$many_values[] = $attr->name;
	}
	printf(
		'<p>%s: %s</p>',
		get_taxonomy($custom_attribute)->labels->name,
		implode(', ', $many_values)
	);
}

?>