code: def _raw_weights(self):
          
          if self._debug:
              return np.array([[],[],[],[]])
  
          if not self._running:
              raise ValueError('Weight sensor is not running!')
          if len(self._weight_buffers) == 0:
              time.sleep(0.3)
              if len(self._weight_buffers) == 0:
                  raise ValueError('Weight sensor is not retrieving data!')
          weights = np.array(self._weight_buffers)
          return weights
docs: Create a numpy array containing the raw sensor weights.