python import statsd statsd_client = statsd.StatsClient(host='localhost', port=8125) def track_page_view(page): statsd_client.incr('page_view.' + page) def track_unique_visitor(user_id): statsd_client.set_add('unique_visitors', user_id) def track_conversion(): statsd_client.incr('add_to_cart') statsd_client.incr('purchase') def track_time_on_page(page, time): statsd_client.timing('time_on_page.' + page, time) def track_error_rate(page, error): statsd_client.incr('error.' + page) statsd_client.incr('error') statsd_client.incr('error.' + error) @statsd_client.timer('process_request_time') def process_request(): @app.route('/home') def home(): page = 'home' track_page_view(page) track_unique_visitor(user_id) track_time_on_page(page, time) @app.errorhandler(500) def server_error(error): track_error_rate('home', error)