code: def indexables(self):
          
          if self._indexables is None:
  
              d = self.description
  
              # the index columns is just a simple index
              self._indexables = [GenericIndexCol(name='index', axis=0)]
  
              for i, n in enumerate(d._v_names):
  
                  dc = GenericDataIndexableCol(
                      name=n, pos=i, values=[n], version=self.version)
                  self._indexables.append(dc)
  
          return self._indexables
docs: create the indexables from the table description