A sphinx extension for dooble.
pip install dooble
In your sphinx project configuration, add dooble to the extensions:
extensions = [
'sphinxcontrib_dooble',
]
Then marble diagrams can be added with the new marble directive:
.. marble::
:alt: map
---1---2---3---4--->
[ map(i: i*2) ]
---2---4---6---8--->