registry.py 文件源码

def get_component_class(component_name):
    # type: (Text) -> Optional[Type[Component]]
    """Resolve component name to a registered components class."""

    if component_name not in registered_components:
        try:
            return utils.class_from_module_path(component_name)
        except Exception:
            raise Exception(
                    "Failed to find component class for '{}'. Unknown "
                    "component name. Check your configured pipeline and make "
                    "sure the mentioned component is not misspelled. If you "
                    "are creating your own component, make sure it is either "
                    "listed as part of the `component_classes` in "
                    "`rasa_nlu.registry.py` or is a proper name of a class "
                    "in a module.".format(component_name))
    return registered_components[component_name]