code: def main(list_ids, model, contact_server, raw_data_id, show_raw,
           mysql_cfg='mysql_online'):
      
      if list_ids:
          preprocessing_desc, _, _ = _get_system(model)
          raw_datapath = os.path.join(utils.get_project_root(),
                                      preprocessing_desc['data-source'])
          _list_ids(raw_datapath)
      else:
          if contact_server:
              data = _fetch_data_from_server(raw_data_id, mysql_cfg)
              print("hwrt version: %s" % hwrt.__version__)
              if data is not None:
                  display_data(data['data'], data['id'], model, show_raw)
          else:
              logging.info("RAW_DATA_ID %i does not exist or "
                           "database connection did not work.", raw_data_id)
              # The data was not on the server / the connection to the server did
              # not work. So try it again with the model data
              preprocessing_desc, _, _ = _get_system(model)
              raw_datapath = os.path.join(utils.get_project_root(),
                                          preprocessing_desc['data-source'])
              handwriting = _get_data_from_rawfile(raw_datapath, raw_data_id)
              if handwriting is None:
                  logging.info("Recording with ID %i was not found in %s",
                               raw_data_id,
                               raw_datapath)
              else:
                  print("hwrt version: %s" % hwrt.__version__)
                  display_data(handwriting.raw_data_json,
                               handwriting.formula_id,
                               model,
                               show_raw)
docs: Main function of view.py.