message: Makes tf.Hub models compatible with tflite_convert.
diff: @@ -30,13 +30,15 @@ from tensorflow.python.platform import app
  def _parse_array(values, type_fn=str):
  - if values:
  + if values is not None:
  return [type_fn(val) for val in values.split(",") if val]
  + return None
  def _parse_set(values):
  - if values:
  - return set(values.split(","))
  + if values is not None:
  + return set([item for item in values.split(",") if item])
  + return None
  def _get_toco_converter(flags):
  @@ -298,8 +300,8 @@ def run_main(_):
  "--saved_model_tag_set",
  type=str,
  help=("Comma-separated set of tags identifying the MetaGraphDef within "
  - "the SavedModel to analyze. All tags must be present. "
  - "(default \"serve\")"))
  + "the SavedModel to analyze. All tags must be present. In order to "
  + "pass in an empty tag set, pass in \"\". (default \"serve\")"))
  parser.add_argument(
  "--saved_model_signature_key",
  type=str,
  