def METHOD_NAME():
    """Construct Protobuf message for Python data reader.
    The Python data reader will import this Python file to access the
    sample access functions.
    """
    import os.path
    import lbann
    module_file = os.path.abspath(__file__)
    module_name = os.path.splitext(os.path.basename(module_file))[0]
    module_dir = os.path.dirname(module_file)
    # Base data reader message
    message = lbann.reader_pb2.DataReader()
    # Training set data reader
    data_reader = message.reader.add()
    data_reader.name = 'python'
    data_reader.role = 'train'
    data_reader.shuffle = True
    data_reader.fraction_of_data_to_use = 1.0
    data_reader.validation_fraction = 0.1
    data_reader.python.module = 'dataset'
    data_reader.python.module_dir = module_dir
    data_reader.python.sample_function = 'get_sample'
    data_reader.python.num_samples_function = 'num_samples'
    data_reader.python.sample_dims_function = 'sample_dims'
    return message