code: def _initEphemerals(self):
      
      self._firstComputeCall = True
      self._accuracy = None
      self._protoScores = None
      self._categoryDistances = None
  
      self._knn = knn_classifier.KNNClassifier(**self.knnParams)
  
      for x in ('_partitions', '_useAuxiliary', '_doSphering',
                '_scanInfo', '_protoScores'):
        if not hasattr(self, x):
          setattr(self, x, None)
docs: Initialize attributes that are not saved with the checkpoint.