[IPython-dev] Highlight lines of code in code cells?

[Eric Matthes]

It took me a couple readings of your response to understand what you were
suggesting. At first I thought [23] and [24] were line numbers, not cell
numbers. What you are describing would be incredibly useful for building
tutorials.

Eric


On Mon, Dec 2, 2013 at 1:03 PM, Mark Voorhies <mark.voorhies at ucsf.edu>wrote:

> On 12/02/2013 09:26 AM, Eric Matthes wrote:
> > I am not very familiar with the codebase yet, and I have few "good long
> > afternoons" at this time of the year. I don't want to clutter my
> notebooks
> > in a way that will be laborious to clean, so I think will use the
> > commenting approach I described above, but also write a quick script that
> > strips the notebooks of these formatting comments. This way anyone who is
> > using the raw notebooks for their own purposes can choose to use my hack,
> > or have a set of clean, unhighlighted notebooks to work with.
> >
> > I like the efficiency of your approach, though, so when I do get a nice
> > afternoon to hack I will play with that approach. If anyone else has a
> good
> > suggestion, I'd love to hear it as well.
> >
> > Thanks.
> >
> > Eric
> >
> >
> > On Mon, Dec 2, 2013 at 8:01 AM, Matthias BUSSONNIER <
> > bussonniermatthias at gmail.com> wrote:
> >
> >>
> >> Le 2 déc. 2013 à 17:37, Eric Matthes a écrit :
> >>
> >>> Hello,
> >>>
> >>> I often use IPython Notebook to write tutorials. In tutorials, I find
> it
> >> helpful to highlight the lines of code that are being changed in each
> >> iteration of a project. Is there a straightforward way to highlight
> >> individual lines of code within a code cell?
> >>>
> >>> I came up with one approach, but it feels like an ugly hack. I write a
> >> comment before the line[s] I want to highlight, and a comment after.
> Then
> >> when converting to html I convert these comment lines to <b> and </b>.
> This
> >> works, but it clutters the raw notebook file with formatting comments.
> >>>
> >>> ##bold
> >>> print("I'd like to highlight this line.")
> >>> ##/bold
> >>>
> >>> becomes:
> >>>
> >>> <b>print("I'd like to highlight this line.")</b>
> >>>
> >>> Is there a better way?
> >>
> >> One could bind code mirror gutter event (click on line number) to store
> >> metadata into the cells,
> >> and write a custom highlighter for the templates in nbconvert.
> >> This is more or less the only thing I  see. I would say that it's a good
> >> long afternoon hack if you
> >> are familiar with the codebase/codemirror and Pygment.
> >>
> >> It would have the advantage that you can easily toggle this highlight on
> >> and of with a flag.
> >>
> >> --
> >> Matthias
>
> It would be very nice to have this as a cell magic that would highlight
> lines not in a reference
> cell (or render as a diff relative to the reference cell).
>
> E.g.,
>
> [23] def Hello():
>         print "Hello, World"
>
> [24] %%diff 23
>       def Hello(s)
>         print "Hello, %s" % s
>
> No idea how to do this, though =)
>
> --Mark
>
> >>
> >>
> >>
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> >>
> >
> >
> >
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