gistfile1.txt

user@osgeolive:~$ jupyterhub-singleuser 
Traceback (most recent call last):
  File "/usr/local/bin/jupyterhub-singleuser", line 4, in <module>
    main()
  File "/usr/local/lib/python3.4/dist-packages/jupyterhub/singleuser.py", line 221, in main
    return SingleUserNotebookApp.launch_instance()
  File "/usr/local/lib/python3.4/dist-packages/IPython/config/application.py", line 573, in launch_instance
    app.initialize(argv)
  File "<string>", line 2, in initialize
  File "/usr/local/lib/python3.4/dist-packages/IPython/config/application.py", line 75, in catch_config_error
    return method(app, *args, **kwargs)
  File "/usr/local/lib/python3.4/dist-packages/IPython/html/notebookapp.py", line 1015, in initialize
    self.init_webapp()
  File "/usr/local/lib/python3.4/dist-packages/jupyterhub/singleuser.py", line 192, in init_webapp
    s['hub_api_key'] = env.pop('JPY_API_TOKEN')
  File "/usr/lib/python3.4/_collections_abc.py", line 533, in pop
    value = self[key]
  File "/usr/lib/python3.4/os.py", line 631, in __getitem__
    raise KeyError(key) from None
KeyError: 'JPY_API_TOKEN'

If you suspect this is an IPython bug, please report it at:
    https://github.com/ipython/ipython/issues
or send an email to the mailing list at ipython-dev@scipy.org

You can print a more detailed traceback right now with "%tb", or use "%debug"
to interactively debug it.

Extra-detailed tracebacks for bug-reporting purposes can be enabled via:
    c.Application.verbose_crash=True