code: def start_daemon():
          
          if RequestLog.daemon is None:
              parser = get_nginx_parser()
              RequestLog.daemon = RequestLog.ParseToDBThread(parser, daemon=True)
          RequestLog.daemon.start()
          return RequestLog.daemon
docs: Start a thread to continuously read log files and append lines in DB.
  
          Work in progress. Currently the thread doesn't append anything,
          it only print the information parsed from each line read.
  
          Returns:
              thread: the started thread.