code: def get_attrs(self):
          
          self.non_index_axes = []
          self.nan_rep = None
          self.levels = []
  
          self.index_axes = [a.infer(self)
                             for a in self.indexables if a.is_an_indexable]
          self.values_axes = [a.infer(self)
                              for a in self.indexables if not a.is_an_indexable]
          self.data_columns = [a.name for a in self.values_axes]
docs: retrieve our attributes