docs: def info_data(self, data_info=None, completo=True, key=None, verbose=True):
          """Show some info."""
  
          def _info_dataframe(data_frame):
              if completo:
                  print('\n', data_frame.info(), '\n', data_frame.describe(), '\n')
              print(data_frame.head())
              print(data_frame.tail())
  
          if verbose:
              if data_info is None:
                  _info_dataframe(self.data[key or self.masterkey])
              elif type(data_info) is dict:
                  [_info_dataframe(df) for df in data_info.values()]
              else:
                  _info_dataframe(data_info)