look at the nbgrader docs around "philosophy and the approach" that will
show you the folder structure. That structure is not created by default in
jupyterhub when you install nbgrader. I believe at the miniumum you need
the source folder and a folder that is identified in the nbgrader_config.py
file as the course id. If you run "nbgrader quickstart <some course id >"
that will generate the folder minimum folder structure as an example to
follow.
cheers,
alvin
On Friday, January 11, 2019 at 2:17:52 AM UTC-7, vishwesh shrimali wrote:
>
> Hi everyone!
>
> I recently launched a TLJH server (sincere thanks to the developers). I
> have managed to install kernels for multiple languages - C++ (Xeus-Cling),
> Python, R. I now want to use nbgrader to develop assignments in all the 3
> languages. I logged in to the hub from the admin account, opened the
> terminal and used the following commands:
>
> sudo jupyter nbextension install --sys-prefix --py nbgrader --overwritesudo
> jupyter nbextension enable --sys-prefix --py nbgradersudo jupyter
> serverextension enable --sys-prefix --py nbgrader
>
> This in turn enabled the formgrader extension and the assignment
> extension. First, when I try to click the formgrader extension, I get the
> *404:
> Page Not Found* error.
> I then used the following command to create a sample course:
>
> nbgrader quickstart course_id
>
>
> Still, the situation is the same. Second, when I login using a student
> account, I am able to see the formgrader and all the options (which I don't
> think a student should be allowed to see). Also, when the student clicks on
> the Assignment option, they get the following errors:
>
> Traceback (most recent call last): File
> "/opt/tljh/user/lib/python3.6/site-packages/nbgrader/server_extensions/assignment_list/handlers.py",
>
> line 65, in list_released_assignments assignments = lister.start() File
> "/opt/tljh/user/lib/python3.6/site-packages/nbgrader/exchange/list.py",
> line 129, in start super(ExchangeList, self).start() File
> "/opt/tljh/user/lib/python3.6/site-packages/nbgrader/exchange/exchange.py",
> line 122, in start self.ensure_root() File
> "/opt/tljh/user/lib/python3.6/site-packages/nbgrader/exchange/exchange.py",
> line 100, in ensure_root self.fail("Unwritable directory, please contact
> your instructor: {}".format(self.root)) File
> "/opt/tljh/user/lib/python3.6/site-packages/nbgrader/exchange/exchange.py",
> line 78, in fail raise ExchangeError(msg)
> nbgrader.exchange.exchange.ExchangeError: Unwritable directory, please
> contact your instructor: /srv/nbgrader/exchange
> Am I missing something? Can someone point me in the right direction?
>
> Thanks in advance
>
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