components.py 文件源码

def validate_arguments(pipeline, context, allow_empty_pipeline=False):
    # type: (List[Component], Dict[Text, Any], bool) -> None
    """Validates a pipeline before it is run. Ensures, that all arguments are present to train the pipeline."""

    # Ensure the pipeline is not empty
    if not allow_empty_pipeline and len(pipeline) == 0:
        raise ValueError("Can not train an empty pipeline. " +
                         "Make sure to specify a proper pipeline in the configuration using the `pipeline` key." +
                         "The `backend` configuration key is NOT supported anymore.")

    provided_properties = set(context.keys())

    for component in pipeline:
        for r in component.requires:
            if r not in provided_properties:
                raise Exception("Failed to validate at component '{}'. Missing property: '{}'".format(
                    component.name, r))
        provided_properties.update(component.provides)