Pure insanity in one line

insanity.py

(
    lambda args: map(
        lambda repo: __import__("os").system('git clone {0} {1}/{2}'.format(
            repo.git_url,
            args.backupdir,
            repo.name)
        ),
        __import__("pygithub3").Github().repos.list(args.username).all()
    )
)(
    (
        lambda : (
            lambda : [
                globals().update(
                    argparser=__import__("argparse").ArgumentParser(
                        description="Backup allyour github repos"
                    )
                ),
                map(
                    lambda arg: globals()["argparser"].add_argument(
                        *arg["args"],
                        **arg["kwargs"]
                    ),
                    [
                        {
                            "args": ("username",),
                            "kwargs": {"help": "A Github username"}
                        }, {
                            "args": ("backupdir",),
                            "kwargs": {
                                "help": "The folder where you want your backups
                                to do",
                            }
                        }
                    ]
                ),
                globals()["argparser"].parse_args()
            ]
        )()[-1]
    )()
)