We use jupyter-sphinx

​ https://jupyter-sphinx.readthedocs.io/en/latest/

to facilitate live sage documentation based on jupyter and Thebe.

For documentation authors, new directives are available:

.. ONLY:: pdf 

.. JUPYTER-EXECUTE::  

in addition to

.. ONLY:: html

See the branch for examples.

Related tickets: #31027

Depends on #33529

CC: @kwankyu @jhpalmieri @nthiery @egourgoulhon @dimpase

Component: documentation

Author: Kwankyu Lee, Matthias Koeppe

Branch: 72c8378

Reviewer: Matthias Koeppe, Dima Pasechnik

Issue created by migration from https://trac.sagemath.org/ticket/33507