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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def train(config_path: str, cl_arguments: Iterable[str], output_root: str) -> None: """ Load config and start the training. :param config_path: path to configuration file :param cl_arguments: additional command line arguments which will update the configuration :param output_root: output root in which the training directory will be created """

    config = None

    try:
        config_path = find_config(config_path)
        config = load_config(config_file=config_path, additional_args=cl_arguments)
        validate_config(config)
        logging.debug('\tLoaded config: %s', config)
    except Exception as ex:  # pylint: disable=broad-except
        fallback('Loading config failed', ex)

    run(config=config, output_root=output_root)