代码高亮markdown

# add monitor
def add_monitor(d):
    logger.debug('add monitor is %s' % d)
    conn = monitor_db.get_connection_with_url(url)

    for key in d.keys():
        logger.debug("form data is %s" % json.loads(key))
        d_dict = json.loads(key)
        conn.execute(T_Monitor.insert(), [{
            'credit_type': d_dict['credit_type']
            , 'query_type': d_dict['query_type']
            , 'credit_status': d_dict['credit_status']
            , 'elapsed_time': int(random.random() * 100)
        }])