def _is_raster_path_band_formatted(raster_path_band):
    """Return true if raster path band is a (str, int) tuple/list."""
    if not isinstance(raster_path_band, (list, tuple)):
        return False
    elif len(raster_path_band) != 2:
        return False
    elif not isinstance(raster_path_band[0], str):
        return False
    elif not isinstance(raster_path_band[1], int):
        return False
    else:
        return True