__main__.py 文件源码

def parse_args():
    parser = argparse.ArgumentParser(description="set (near-realtime) picture of Earth as your desktop background",
                                     epilog="http://labs.boramalper.org/himawaripy")

    parser.add_argument("--version", action="version", version="%(prog)s {}.{}.{}".format(*HIMAWARIPY_VERSION))

    group = parser.add_mutually_exclusive_group()

    group.add_argument("--auto-offset", action="store_true", dest="auto_offset", default=False,
                       help="determine offset automatically")
    group.add_argument("-o", "--offset", type=int, dest="offset", default=10,
                       help="UTC time offset in hours, must be less than or equal to +10")

    parser.add_argument("-l", "--level", type=int, choices=[4, 8, 16, 20], dest="level", default=4,
                        help="increases the quality (and the size) of each tile. possible values are 4, 8, 16, 20")
    parser.add_argument("-d", "--deadline", type=int, dest="deadline", default=6,
                        help="deadline in minutes to download all the tiles, set 0 to cancel")
    parser.add_argument("--save-battery", action="store_true", dest="save_battery", default=False,
                        help="stop refreshing on battery")
    parser.add_argument("--output-dir", type=str, dest="output_dir",
                        help="directory to save the temporary background image",
                        default=appdirs.user_cache_dir(appname="himawaripy", appauthor=False))

    args = parser.parse_args()

    if not -12 <= args.offset <= 10:
        sys.exit("OFFSET has to be between -12 and +10!\n")

    if not args.deadline >= 0:
        sys.exit("DEADLINE has to be greater than (or equal to if you want to disable) zero!\n")

    return args