code: def printDeadCells(self):
      
      columnCasualties = numpy.zeros(self.numberOfColumns())
      for cell in self.deadCells:
        col = self.columnForCell(cell)
        columnCasualties[col] += 1
      for col in range(self.numberOfColumns()):
        print col, columnCasualties[col]
docs: Print statistics for the dead cells