def METHOD_NAME(lbann):
    """Construct Protobuf message for Python data reader.
    The Python data reader will import the current Python file to
    access the sample access functions.
    Args:
        lbann (module): Module for LBANN Python frontend
    """
    message = lbann.reader_pb2.DataReader()
    _reader = message.reader.add()
    _reader.name = 'synthetic'
    _reader.role = 'train'
    _reader.num_samples = 2
    _reader.synth_dimensions = '1'
    _reader.fraction_of_data_to_use = 1.0
    return message