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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 run_std_server(self):
 """Starts a TensorFlow server and joins the serving thread. Typically used for parameter servers. Raises: ValueError: if not enough information is available in the estimator's config to create a server. """

    config = tf.estimator.RunConfig()
    server = tf.train.Server(
        config.cluster_spec,
        job_name=config.task_type,
        task_index=config.task_id,
        protocol=config.protocol)
    server.join()