New comment by tornaria on void-packages repository

https://github.com/void-linux/void-packages/pull/33481#issuecomment-941443311

Comment:
> I find sympy's terminal plotting charming, and in that case what's missing is pretty clear.

Indeed. And although mpmath doesn't have ascii art plotting, it gives a clear error message (```No module named 'pylab'```, which is easy to trace back to matplotlib using xlocate).

> Missing performance, otoh, isn't as clear.

Fair enough; I can do a PR for mpmath later (unless you prefer it to be here).