code: def parse_cell(self, cell, coords, cell_mode=CellMode.cooked):
      
      try:
        return int(cell)
      except ValueError:
        pass
      try:
        return float(cell)
      except ValueError:
        pass
      # TODO Check for dates?
      return cell
docs: Tries to convert the value first to an int, then a float and if neither is
      successful it returns the string value.