Trouble with setting admin user

[Brian Novogradac]

I've modified the jupyterhub_config.py file to add a user as an admin but its not working.  I am using the Authenticator config below.  

# If unspecified, only the user that launches the server will be admin.

c.Authenticator.admin_users = set(useronsystem)

when i add the user id in the set area, jupyterhub fails to start and i get teh  No admin users, admin interface will be unavailable.

then it gives an erro for every character in the user id:

[E 2016-08-30 09:53:28.221 JupyterHub app:864] Error adding user 'o' already in db

    Traceback (most recent call last):

      File "/opt/jupyterhub/jupyterhub/app.py", line 859, in init_users

        yield gen.maybe_future(self.authenticator.add_user(user))

      File "/opt/jupyterhub/jupyterhub/auth.py", line 328, in add_user

        raise KeyError("User %s does not exist." % user.name)

    KeyError: 'User o does not exist.'

I'm stumped

Brian

[MinRK]

You want set(['user']) not set('user'). If you pass a single list to set, you get each character as an item in the set, not a single item:

In [1]: set('user')
Out[1]: {'e', 'r', 's', 'u'}

In [2]: set(['user'])
Out[2]: {'user'}

-MinRK

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