Returns the piece size (vocabulary size).

  Args:
    model_file: The sentencepiece model file path.
    model_proto: The sentencepiece model serialized proto.
                 Either `model_file` or `model_proto` must be set.
    name: The name argument that is passed to the op function.
  Returns:
    A scalar representing the vocabulary size.

def piece_size(model_file=None, model_proto=None, name=None):
  """Returns the piece size (vocabulary size).

  Args:
    model_file: The sentencepiece model file path.
    model_proto: The sentencepiece model serialized proto.
                 Either `model_file` or `model_proto` must be set.
    name: The name argument that is passed to the op function.
  Returns:
    A scalar representing the vocabulary size.
  """

  return _gen_sentencepiece_processor_op.sentencepiece_get_piece_size(
      model_file=model_file, model_proto=model_proto, name=name)