code: def load_from_local(cls):
          
          try:
              with open(cls.LOCAL_DB_PATH, 'rb') as f:
                  b = f.read()
                  s = security.protege_data(b, False)
          except (FileNotFoundError, KeyError):
              logging.exception(cls.__name__)
              raise StructureError(
                  "Erreur dans le chargement de la sauvegarde locale !")
          else:
              return cls(cls.decode_json_str(s))
docs: Load datas from local file.