components.py 文件源码

def load_component(self, component_name, model_dir, model_metadata, **context):
        # type: (Text, Text, Metadata, **Any) -> Component
        """Tries to retrieve a component from the cache, calls `load` to create a new component."""
        from rasa_nlu import registry
        from rasa_nlu.model import Metadata

        try:
            cached_component, cache_key = self.__get_cached_component(component_name, model_metadata)
            component = registry.load_component_by_name(component_name, model_dir,
                                                        model_metadata, cached_component, **context)
            if not cached_component:
                # If the component wasn't in the cache, let us add it if possible
                self.__add_to_cache(component, cache_key)
            return component
        except MissingArgumentError as e:  # pragma: no cover
            raise Exception("Failed to load component '{}'. {}".format(component_name, e))