code: def create_hparams(hparams_set,
                     hparams_overrides_str="",
                     data_dir=None,
                     problem_name=None,
                     hparams_path=None):
    
    hparams = registry.hparams(hparams_set)
    if hparams_path and tf.gfile.Exists(hparams_path):
      hparams = create_hparams_from_json(hparams_path, hparams)
    if data_dir:
      hparams.add_hparam("data_dir", data_dir)
    if hparams_overrides_str:
      tf.logging.info("Overriding hparams in %s with %s", hparams_set,
                      hparams_overrides_str)
      hparams = hparams.parse(hparams_overrides_str)
    if problem_name:
      add_problem_hparams(hparams, problem_name)
    return hparams
docs: Create HParams with data_dir and problem hparams, if kwargs provided.