nbextensions and nbconvert

[tarokiritani]

Is it possible to use nbextensions with nbconvert? I ran jupyter nbconvert --to html nynotebook.ipynb. Then, toc2 seems to be effective in the resulting html. However, collapsible headings is no longer working.

Based on the previous issue #198, I understand that in order to use nbextensions with nbconvert I need to

1. make "jupyter_nbconvert_config.py" in jupyter configuration folder (in my win 8.1, User.jupyter),
2. put nbextension .py files in extensions folder, and
3. I somehow need to write a template file in User.jupyter\extensions.

Am I mistaken? I have not found collapsible_headings.py in my env, and have not figured out the format of the template file. Could anyone give me pointers?

[jcb91]

Is it possible to use nbextensions with nbconvert?

Some of them support nbconvert, to various degrees. This is down to which have had templates, exporters etc written for them. See jupyter-contrib-nbextensions.readthedocs.io/en/latest/exporting for docs on the subject.

Based on the previous issue #198, I understand that in order to use nbextensions with nbconvert I need to [...] Am I mistaken?

Well, that advice is a little out of date, and a lot of that process is now done automatically by the package installation. Again, refer to the docs at jupyter-contrib-nbextensions.readthedocs.io/en/latest/exporting for the latest info.

I ran jupyter nbconvert --to html nynotebook.ipynb. Then, toc2 seems to be effective in the resulting html. However, collapsible headings is no longer working

I'm not completely familiar with how toc2 might function even without extra options passed to nbconvert, although I know it does provide an exporter for embedding into html output (see http://jupyter-contrib-nbextensions.readthedocs.io/en/latest/exporting.html#export-table-of-contents). The support for collapsible_headings exports is currently very limited (essentially, it'll just remove any hidden cells from the output), basically because I haven't written a version which can be embedded yet. Since you sound like you might use it, I'll give it some thought to it & see what I can come up with...

[tarokiritani]

That would be great. This feature is very useful to read my long notebook. I just wrote a makeshift jquery script and put it in my notebook as a raw nbconvert script. I will use this for now. https://gist.github.com/tarokiritani/b1b5fefa5f19e57f107bd1c3b16c742a

[kikocorreoso]

Today I was thinking on this, a way to make a composable conversion, i.e., to export using TOC2, hidden cells,..., without conflicts between them.

Any idea or hint about how to start? A switch on a template? e.g.:

{% block whatever %}
  {% if TOC %}
    {# ... #}
  {% endif %}
{ % endblock %}

Should be a defined way to do so? I'm thinking in exporting notebooks to blogpost or standalone web pages but maintining some of the interactive functionality (TOC, widgets, some ad-hoc js to hide-show code cells, collapse sections, add styles based on the chosen options of the conversion,...).

Is there a roadmap for this?

[jfbercher]

@kikocorreoso Normally there is no reason to have conflicts between these various extensions. The templates can inherit from other templates; which means that you can chain several templates, eg toc2.tpl, nbextensions.tpl [which I think includes the older hide_input.tpl/hide_input_output.tpl templates].
I am not a specialist at all, but if you want to add switches in your jinja2 template, I think that you will have to write a preprocessor or an exporter, and pass variables either in the resources dictionary, or in the global environment, see eg https://github.com/jfbercher/jupyter_latex_envs/blob/master/src/latex_envs/latex_envs.py#L71-L73 and https://github.com/jfbercher/jupyter_latex_envs/blob/master/src/latex_envs/latex_envs.py#L284-L285.
I used the last one to include a new function in the jinja2 template, see https://github.com/jfbercher/jupyter_latex_envs/blob/master/src/latex_envs/latex_envs.py#L212-L224

[juhasch]

I have added a description of nbextensions.tplin #850

[jcb91]

I've been thinking for a while of making an nbconvert exporter which can embed generic CSS/js header tags, which could then be used for any embeddable nbextension, without requiring altering anything beyond the head tag in the HTML source. Unfortunately since none of the notebook JavaScript frameworks get embedded (apart from mathjax, which brings requirejs and jquery), the regular live-notebook nbextensions tend not to work without rewrites/alterations. You can already embed toc2 using its exporter - see exporting docs at http://jupyter_contrib_nbextensions.readthedocs.io (I think, might have address wrong).

[kikocorreoso]

thanks @jfbercher @juhasch @jcb91 for all the valuable suggestions, PR and for pointing me to some valid resources.

[jcb91]

I've added proper html-export capability for collapsible_headings in #892. However, given the export mechanism, it's not currently possible to support exports to both collapsible_headings and toc2 at the same time (not that difficult to fix though, I think, if people think it useful)

[psychemedia]

I've recently been exploring the use of the code prettifier extension, and it strikes me that this is another extension that could be valuable as an nbconvert cell processor, eg for tidying up a set of notebooks to make sure the code cells are styled consistently.

Anyone know of a snippet that demonstrates how this can be done? (i.e. how to invoke the code prettifier in the context of nbconvert?)