[Matplotlib-devel] nbagg and exceptions raised by callbacks

Nathan Goldbaum nathan12343 at gmail.com
Mon Sep 21 17:28:54 CEST 2015

I've opened an issue to track this here:

On Fri, Sep 18, 2015 at 1:36 PM, Nathan Goldbaum <nathan12343 at gmail.com>

> Hi all,
> I'm having a bit of an issue trying to debug a plot callback using the
> nbagg backend.
> The following notebook illustrates the issue:
> https://gist.github.com/anonymous/e6cb1acd8bfbfda35bf1
> If you run that notebook (based on an example in the maptlotlib
> documentation; I'm using IPython 4.0 and Matplotlib 1.5rc), and try to zoom
> in on the right-hand panel the exception raised by the ax_update function
> is never propagated up to the level of the user. If I remove the call to
> "%matplotlib notebook" from the first cell and run the notebook, a GUI
> window provided by the MacOSX backend will pop up, and if I zoom into the
> right-hand plot there, an exception does get printed in the notebook.
> Is this a bug in the nbagg backend or is there some sort of runtime
> parameter I need to set to make sure exceptions raised while updating an
> nbagg plot get propogated back up to my runtime environment?
> Thanks for your help,
> Nathan Goldbaum
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