code: def select_coords(self):
          
          start, stop = self.start, self.stop
          nrows = self.table.nrows
          if start is None:
              start = 0
          elif start < 0:
              start += nrows
          if self.stop is None:
              stop = nrows
          elif stop < 0:
              stop += nrows
  
          if self.condition is not None:
              return self.table.table.get_where_list(self.condition.format(),
                                                     start=start, stop=stop,
                                                     sort=True)
          elif self.coordinates is not None:
              return self.coordinates
  
          return np.arange(start, stop)
docs: generate the selection