Hi Darian,
Thank first :)
jupyter lab build do the job 

jupyter lab runs but inside I haven't choice for sage ?

I compiled sage-8.8 then I linked it to /usr/bin/sage so I can use it as 
system wide.
After I installed jupyterlab with pip in sage (as I always do for a long 
times)

sage -sh
pip install jupyterlab --user --upgrade


Le mercredi 17 juillet 2019 13:35:45 UTC+2, Henri Girard a écrit :
>
> Hi,
>
> I can't no more use jupyterlab in sage -n=jupyterlab, I got this error 
> message ?
>
> in a console jupyter lab build (if I don't sudo -H it doesn't have 
permissions ?

in a sage -sh console it doesn't here is the error message ?
(sage-sh) pi@pc:~$ sudo -H jupyter lab build 
Traceback (most recent call last):
  File "/usr/local/bin/jupyter-lab", line 7, in <module>
    from jupyterlab.labapp import main
ModuleNotFoundError: No module named 'jupyterlab'
 
I guess it's a problem of permissions ? But I don't know how to set it ?

Cheers 
Henri

> Cannot find template: "error.html" 
>
> In "/home/pi/sage/local/share/jupyter/lab/static"
>
>
> I am on ubuntu 19.10, it used to work and suddenly stop... I installed it 
> this way 
>
>
> sage -sh
>
> then pip install jupyterlab --user --upgrade 
>
>
> exit
>
>
> Any help ?
>
>
> Regards
>
> Henri
>

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