code: def _ready(self):
          
          # if DOUT pin is low, data is ready for reading
          _is_ready = GPIO.input(self._dout) == 0
          logging.debug("check data ready for reading: {result}".format(
              result="YES" if _is_ready is True else "NO"
          ))
          return _is_ready
docs: check if ther is som data is ready to get read.
          :return True if there is some date
          :rtype bool