[IPython-dev] Supporting the qtconsole and notebook display system simultaneously

[Jason Moore]

I didn't know about that PR. Thanks for pointing it. That likely solves the
issue that I've raised here. I'll try it out and discuss with Aaron.


Jason
moorepants.info
+01 530-601-9791

On Thu, Jan 7, 2016 at 5:39 AM, Carlos Córdoba <ccordoba12 at gmail.com> wrote:

> El 06/01/16 a las 00:13, Jason Moore escribió:
>
> SymPy has a comprehensive printing system and we leverage IPython's
> qtconsole and notebook display abilities to show mathematics in unicode,
> mathjax, and png outputs. Typically all three of these are generated and
> the IPython frontend can choose what to display.
>
> We've hit a bug that we can't figure out how to fix though. Matplotlib has
> a minimal LaTeX implementation and can output PNGs. If a user doesn't have
> a full LaTeX suit installed we fall back to that. But since matplotlib
> doesn't handle LaTeX environments, it can't render things like matrices.
>
> Now if a qtconsole user tries to display a matrix, this fails if
> matplotlib is the only available renderer. But if the user is using the
> notebook then the matplotlib renderer will fail but mathjax will print
> properly. We'd like to fall back to unicode printing if matplotlib fails to
> print **only in the qtconsole**, but render with mathjax in the notebook.
>
>
> There's already a pull request in qtconsole about this problem:
>
> https://github.com/jupyter/qtconsole/pull/65
>
>
> Cheers,
> Carlos
>
>
> So, as far as we can tell, we need to know which frontend is trying to
> display our object so that we can handle errors properly. We haven't been
> able to think of a workaround that is agnostic of the frontend.
>
> There is some discussion in this PR:
> <https://github.com/sympy/sympy/pull/9976>
> https://github.com/sympy/sympy/pull/9976 (among others).
>
> Any suggestions?
>
> Jason
> moorepants.info
> +01 530-601-9791
>
>
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