You don't have to import everything just to print the help. I try to avoid top-level imports until after the CLI arguments have been parsed, so the only import until then is `argparse` or `click`. This way, startup appears to be instant even in Python.

Example:

    if __name__ == "__main__":
        from myapp.cli import parse_args

        args = parse_args()

        # The program will exit here if `-h` is given

        # Now do the heavy imports

        from myapp.lib import run_app

        run_app(args)