code: def getBucketIndices(self, input):
      
  
      if type(input) is float and math.isnan(input):
        input = SENTINEL_VALUE_FOR_MISSING_DATA
  
      if input == SENTINEL_VALUE_FOR_MISSING_DATA:
        return [None]
  
      minbin = self._getFirstOnBit(input)[0]
  
      # For periodic encoders, the bucket index is the index of the center bit
      if self.periodic:
        bucketIdx = minbin + self.halfwidth
        if bucketIdx < 0:
          bucketIdx += self.n
  
      # for non-periodic encoders, the bucket index is the index of the left bit
      else:
        bucketIdx = minbin
  
      return [bucketIdx]
docs: See method description in base.py