Converts hub login names to unix system user names when using the tljh.UserCreatingSpawner

tljh_system_user

#!/usr/bin/env python

# Author: Martin Claus <[email protected]>
import sys

# Maybe there is a better way to import tljh.
sys.path.insert(0, '/opt/tljh/hub/lib/python3.6/site-packages/')
from tljh.normalize import generate_system_username

import argparse

def _convert_to_system_username(username, *args):
    return generate_system_username(f'jupyter-{username}')

def _table_output(username, max_len, *args):
    return f"{username:<{max_len}s} {_convert_to_system_username(username)}"


parser = argparse.ArgumentParser(
    description="""
    Converts hub login names to unix system user names when using the tljh.UserCreatingSpawner.\n
    See https://github.com/jupyterhub/the-littlest-jupyterhub/blob/master/tljh/user_creating_spawner.py#L21
    """
)
parser.add_argument(
    'usernames', metavar='USERNAME', type=str, nargs='+',
    help='Hub username to convert'
)
parser.add_argument(
    '--table', '-t', dest='renderer', action='store_const',
    const=_table_output,
    default=_convert_to_system_username,
    help="Print tabular output of hub usernames with corresponding system usernames."
)


def main():
    args = parser.parse_args()
    max_width = max(map(len, args.usernames))
    print('\n'.join(map(args.renderer, args.usernames, (max_width for n in args.usernames))))
    

if __name__ == "__main__":
    main()

Thank you!