city.py

class City:

    name: str = "vienna"

    def create_zoo(self, owner_name: str) -> Optional[Zoo]:
        zoo_configs: Dict[
            str, ZooConfiguration
        ] = ZOOsConfigBuilder().get_configs()
        
        config = zoo_configs.get(self.name)

        if not config or not config.is_open_to_public:
            return None
        
        zoo_outline: ZooOutline = config.get_config(owner_name, size=130)
        return Zoo(zoo_outline)