code: def select(self):
          
          if self.condition is not None:
              return self.table.table.read_where(self.condition.format(),
                                                 start=self.start,
                                                 stop=self.stop)
          elif self.coordinates is not None:
              return self.table.table.read_coordinates(self.coordinates)
          return self.table.table.read(start=self.start, stop=self.stop)
docs: generate the selection