code: def reset(self):
      
      self.bumpPhases = np.empty((2,0), dtype="float")
      self.phaseDisplacement = np.empty((0,2), dtype="float")
      self.cellsForActivePhases = np.empty(0, dtype="int")
      self.activeCells = np.empty(0, dtype="int")
      self.learningCells = np.empty(0, dtype="int")
      self.sensoryAssociatedCells = np.empty(0, dtype="int")
docs: Clear the active cells.