show posts views column in main articles page

/*
 * show posts views column in main articles page
 *
 */
function add_articles_views_column($columns) {
    return array_merge( $columns,
        array('views' => __('Views')) );
}
add_filter('manage_articles_posts_columns' , 'add_articles_views_column');


function my_articles_views_columns( $column, $post_id ){
    global $post;
    switch ($column){
        case 'views':
            $views = get_post_meta($post_id, 'post_views_count', true );
            /* If no duration is found, output a default message. */
            if ( empty( $views ) )
            echo __( 'No Views' );

            /* If there is a duration, append 'minutes' to the text string. */
        else
            printf( __( '%s views' ), $views );
            break;
    }
}
add_action( 'manage_articles_posts_custom_column', 'my_articles_views_columns', 10, 2 );