Comment Filter to fetch comments from last week with new WP_Date_Query()

chrico_filter_comments_clauses_get_comments_last_week.php

<?php
/**
 * adding a date-filter to the comment_query to fetch comments from last week
 *
 * @param	Array $clauses
 * @return	Array $clauses
*/
function chrico_filter_comments_clauses_get_comments_last_week( $clauses ){
	$last_week	= gmdate( 'W' ) - 1;
	$query_args	= array(
		'w'		=> $last_week
	);
	$date_query		= new \WP_Date_Query( $query_args, 'comment_date' );
	$clauses['where']	.= $date_query->get_sql();
	return $clauses;
}

add_filter('comments_clauses', 'chrico_filter_comments_clauses_get_comments_last_week' );
$comments = get_comments();
remove_filter( 'comments_clauses', 'chrico_filter_comments_clauses_get_comments_last_week' );