[Matplotlib-users] Using Matplotlib nbagg for _repr_html_ for notebooks

[Thomas Caswell]

Ah, I misunderstood!

In that case I suggest looking at ipympl / jupyter-matplotlib (which is a
ipywidget based backend).  I suspect you can use the same process to get a
rendered canvas, and there is likely a way to extract the widget objects
from it.

Tom

On Wed, Nov 7, 2018 at 7:24 PM Juan Nunez-Iglesias <jni.soma at gmail.com>
wrote:

> Thanks Tom!
>
> My question is, would it be possible for the html to contain the
> interactive MPL figure, as returned by the notebook backend? There's also
> _repr_javascript_ it turns out.
>
> But yes, this is already great, I can use this for _repr_png_.
>
> I'm targeting 3.0+ so "new enough matplotlib" shouldn't be an issue. =)
>
> Juan.
>
> On Thu, Nov 8, 2018, at 11:16 AM, Thomas Caswell wrote:
>
> Something like:
>
> ```
> from matplotlib.figure import Figure
> from matplotlib.backends.backend_agg import FigureCanvas
>
> fig = Figure()
> canvas = FigureCanvas(fig)  # this step will be optional in mpl 3.1 (and
> current master)
>
> ax = fig.subplots()  # assuming new enough matplotlib
> ```
>
> or one of the other backends.  If you are doing this for a htmlrepr you
> likely want to also do
>
> ```
> output = BytesIO()
> fig.savefig(output, format='png')
> ```
>
> to get the image as a buffer you can inject into the repr (or SVG?)
>
> Hope that helps!
>
> Tom
>
> On Wed, Nov 7, 2018 at 4:38 PM Juan Nunez-Iglesias <jni.soma at gmail.com>
> wrote:
>
>
> Hi,
>
> I'm working on a class to which I would like to add a _repr_html_ [1]
> method for display in Jupyter notebooks. Is there a way to generate a
> matplotlib notebook backend view "offline" (not using pyplot, since that
> will behave differently depending on the currently active backend), and
> then return the corresponding html?
>
> Thanks,
>
> Juan.
>
> .. [1]:
> https://ipython.readthedocs.io/en/stable/config/integrating.html#rich-display
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>
>
> --
> Thomas Caswell
> tcaswell at gmail.com
>
>
>

-- 
Thomas Caswell
tcaswell at gmail.com
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