code: def get_column(self, column_name):
          
          frame = self._call_func()
          return DataFrameWrapper(self.name, frame,
                                  copy_col=self.copy_col).get_column(column_name)
docs: Returns a column as a Series.
  
          Parameters
          ----------
          column_name : str
  
          Returns
          -------
          column : pandas.Series