def get_version():
    version = {}
    with open("bqueryd/version.py") as fp:
        exec (fp.read(), version)
    return version
def _apply_layer_operation(example_dict, operation_dict):
    """Applies layer operation to radar data.

    :param example_dict: See doc for `reduce_examples_3d_to_2d`.
    :param operation_dict: See doc for `_check_layer_operation`.
    :return: new_radar_matrix: E-by-M-by-N numpy array resulting from layer
        operation.
    """

    _check_layer_operation(example_dict=example_dict,
                           operation_dict=operation_dict)

    height_diffs_metres = (
        example_dict[RADAR_HEIGHTS_KEY] - operation_dict[MIN_HEIGHT_KEY]
    ).astype(float)
    height_diffs_metres[height_diffs_metres > 0] = -numpy.inf
    min_height_index = numpy.argmax(height_diffs_metres)

    height_diffs_metres = (
        operation_dict[MAX_HEIGHT_KEY] - example_dict[RADAR_HEIGHTS_KEY]
    ).astype(float)
    height_diffs_metres[height_diffs_metres > 0] = -numpy.inf
    max_height_index = numpy.argmax(height_diffs_metres)

    operation_dict[MIN_HEIGHT_KEY] = example_dict[
        RADAR_HEIGHTS_KEY][min_height_index]
    operation_dict[MAX_HEIGHT_KEY] = example_dict[
        RADAR_HEIGHTS_KEY][max_height_index]

    operation_name = operation_dict[OPERATION_NAME_KEY]
    operation_function = OPERATION_NAME_TO_FUNCTION_DICT[operation_name]

    if REFL_IMAGE_MATRIX_KEY in example_dict:
        orig_matrix = example_dict[REFL_IMAGE_MATRIX_KEY][
            ..., min_height_index:(max_height_index + 1), 0]
    else:
        field_index = example_dict[RADAR_FIELDS_KEY].index(
            operation_dict[RADAR_FIELD_KEY])

        orig_matrix = example_dict[RADAR_IMAGE_MATRIX_KEY][
            ..., min_height_index:(max_height_index + 1), field_index]

    return operation_function(orig_matrix, axis=-1), operation_dict