[IPython-dev] Status of printing in the notebook

Brian Granger ellisonbg at gmail.com
Tue Jan 31 22:38:54 EST 2012

The notebook printing bug turned out to be quite subtle and its fix is
leading to the refactoring of a lot of code.  It may take a big longer
than I thought, but hopefully in the next few days.

On Tue, Jan 31, 2012 at 7:34 PM, Mark Voorhies <mark.voorhies at ucsf.edu> wrote:
> On Tuesday, January 31, 2012 01:09:03 pm Brian Granger wrote:
>> Mark,
>> Sorry it has taken a few days to get back to you about this.  There is
>> a lot of activity on the notebook right now and I am having a tough
>> time keeping up (even though I am working on it full time!).
>> First, I will fix the notebook printing hopefully today, maybe early tomorrow.
>> On Sat, Jan 28, 2012 at 6:22 PM, Mark Voorhies <mark.voorhies at ucsf.edu> wrote:
>> > I just started using the notebook yesterday (following an upgrade to Firefox 9)
>> > and it's awesome -- so much so that I'm switching to it for everyday work and
>> > am planning to teach from it in April.
>> >
>> > One thing I would like to hack on is an equivalent to the qtconsole's "export
>> > with inlined images" (xhtml+svg / html+inlined png) function (so that I can
>> > save/e-mail finished work as a single file with no dependencies).
>> Yes, we *really* would like to have this capability and are more than
>> willing to help you get started.  Here is a few points:
>> * The IPython.nbformat.v3 subpackage has an infrastructure for
>> notebook readers/writers.  We currently have one for .json and .py
>> files.  This is the place to create one for exporting to HTML.
>> * Exporting to raw HTML is not quite possible.  The reason for this is
>> that we use a couple of Javascript libraries:  MathJax for rendering
>> latex embedded in the HTML, CodeMirror for formatting the code areas
>> with syntax highlighting, and A Markdown parser that converts Markdown
>> to HTML.  We will have to figure out substitutes for these JS
>> libraries in the HTML export.
>> * There are two possible ways of generating raw HTML:
>> 1) First export to reST and then use rst2html to get to the HTML.
>> Some benefits to this, but the downside is that raw Markdown/HTML
>> cells would get lost in the process (although I think that reST
>> suports raw HTML inclusion.  Also, this would make it more difficult
>> to control exactly what the HMTL looks like (IOW use our current CSS
>> styling).
>> 2) Use a templating library to export directly to HTML.  I think this
>> is very worth pursuing as a first line of attack.  The would allow you
>> to simply recreate the right HTML structure with the proper id/classes
>> and then inline our CSS.  It would give you exactly the same look as
>> we have now.  We would still need to figure out how to handle MathJax,
>> CodeMirror and Markdown though.
>> I imagine that in the long run we will support both of these routes.
>> Once we have the writers in place in IPython.nbformat.v3, it will be a
>> simple matter of incorporating them into the notebook server.
>> Here is a github issue where we should continue this discussion:
>> https://github.com/ipython/ipython/issues/860
>> Fernando even has a draft reST exporter implemented.  Let us know if
>> you have questions.
> Thanks!  I'll watch for the notebook printing commit and chime in on
> the issue once I have time to start outlining/hacking -- probably this
> weekend.
> --Mark
>> Cheers,
>> Brian
>> > The print window circa a50ac36bd554 looks like the right starting point (it
>> > would just need inlining of the css and images), but it looks like this version
>> > was scrapped when the wijmo menus were added and that there now may be
>> > different ideas for printing (https://github.com/ipython/ipython/issues/1292).
>> >
>> > So -- is this a good time to start working on this sort of inlining (and, if so,
>> > which code should I be looking at) or would it be better to wait for the next
>> > print window revision (and is there an issue/PR that I should be watching
>> > for this)?
>> >
>> > Thanks,
>> >
>> > Mark
>> >
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Brian E. Granger
Cal Poly State University, San Luis Obispo
bgranger at calpoly.edu and ellisonbg at gmail.com

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