nethercoord.py

from argparse import ArgumentParser

parser = ArgumentParser(prog="NetherCoords", description="Converts Nether coordinates to Overworld coordinates")

parser.add_argument('x', type=int, metavar="X", help="X position")
parser.add_argument('z', type=int, metavar="Z", help="Z position")
parser.add_argument('-o', '--overworld', action='store_true', help="Use Overworld coordinates and convert them to Nether coordinates instead")

def main() -> None:
    args = parser.parse_args()
    x: int = round(args.x / 8) if not args.overworld else round(args.x * 8)
    z: int = round(args.z / 8) if not args.overworld else round(args.z * 8)

    print(f"X: {x}\nZ: {z}")

if __name__ == "__main__":
    main()