nbconvert failure on jupyterhub

[epifanio]

I just upgraded to the latest version (git master) of python, jupyter, notebook, jupyterhub, nbconvert. And I installed IPython-notebook-extensions appliend the changes from:

#402

When tring to save as html, or pdf i have this log :

Could not construct Exporter: The 'parent' trait of a CodeFoldingPreprocessor instance must be a Configurable, but a value of class 'nbconvert.exporters.pdf.PDFExporter' (i.e. <nbconvert.exporters.pdf.PDFExporter object at 0x7fd7f39f8908>) was specified.

and to html:

Could not construct Exporter: The 'parent' trait of a CodeFoldingPreprocessor instance must be a Configurable, but a value of class 'nbconvert.exporters.html.HTMLExporter' (i.e. <nbconvert.exporters.html.HTMLExporter object at 0x7fd7f0a17f60>) was specified.

While this is the full log if I try to use nbcovert from the command line:
https://gist.github.com/50e5e8568c08b4f245cb

I guess it is failing because of the changes in the config files which in my case are:
jupyter_nbconvert_config.py and jupyter_nbconvert_config.json

in the log i see: /home/epinux/.local/share/jupyter/templates but this file is no more on my system and also: jupyter_nbconvert_config-json-L8 i think /user/ is a typo and should be /usr/.

[juhasch]

The error seems to be due to recent changes in places other than nbconvert. I don't see this with the latest master of nbconvert.

The templates path is set using the juyper_data_dir as base director:

from jupyter_core.paths import jupyter_data_dir
jupyter_data_dir()

Can you check what this call returns for you ?

[epifanio]

From a notebook running under the user epinux it returns:

/home/epinux/.local/share/jupyter

if I log out and log in with an other user, like user2 it is giving me:

/home/user2/.local/share/jupyter

In my case there is no .local/share/jupyter directory for all the users. I have all the configuration and extension files in the global directory: /usr/loacl/share/jupyter/.

Does it make sense, In case there is no /home/$USER/.local/share/jupyter (which can be the case for jupyerhub) to have the templat-epath to point to the global directory which is available for all the users and that is:

/usr/loacl/share/jupyter/

[juhasch]

Yes it makes sense to check, if the path exists and use another one instead.
Can you check what this returns:

import jupyter_core.paths
jupyter_core.paths.jupyter_config_path()

[epifanio]

Running:

import jupyter_core.paths
jupyter_core.paths.jupyter_config_path()

From a py3 notebook, as user "epinux" it returns:

['/home/epinux/.jupyter',
 '/home/epilib/Envs/env1/etc/jupyter',
 '/usr/local/etc/jupyter',
 '/etc/jupyter']

[juhasch]

Likely solved by #492. If not, please reopen this issue.