code: def mmGetMetricSequencesPredictedActiveCellsPerColumn(self):
      
      self._mmComputeTransitionTraces()
  
      numCellsPerColumn = []
  
      for predictedActiveCells in (
          self._mmData["predictedActiveCellsForSequence"].values()):
        cellsForColumn = self.mapCellsToColumns(predictedActiveCells)
        numCellsPerColumn += [len(x) for x in cellsForColumn.values()]
  
      return Metric(self,
                    "# predicted => active cells per column for each sequence",
                    numCellsPerColumn)
docs: Metric for number of predicted => active cells per column for each sequence
  
      @return (Metric) metric