This is a Sphinx extension that adds a directive code-tabs that creates a navbar above several alternative code blocks, allowing the user to switch between them.

This can be used to e.g. show a snippet in multiple languages, display instructions for alternative platforms, or (in the future) switch between source and output.

pip install sphinx_code_tabs

To enable the extension in sphinx, simply add the package name in your conf.py to the list of extensions:

extensions = [
    ...
    'sphinx_code_tabs',
]

By enabling the extension you get access to the code-tabs directive that declares a notebook of code block alternatives.

The individual tabs must be created with the code-tab directive which derives from code-block and accepts all of its arguments:

.. code-tabs::

    .. code-tab:: bash
        :title: bash

        echo "Hello, World!"

    .. code-tab:: c
        :title: C/C++
        :emphasize-lines: 2

        #include <stdio.h>
        int main() { printf("Hello, world!\n"); }

    .. code-tab:: python
        :title: python

        print("Hello, world!")

This project has just started. Planned features for the next releases (this might initially include backward-incompatible changes!):

• prerender navbar, and CSS "hidden" classes, so that the layout doesn't change during page reload
• add mechanism to group several tab widgets together, so that the selection is kept in sync (which means users interested in a specific language won't have to change the language on each snippet individually in a longer article)
• adopt "caption" attribute rather using our own "title"
• reuse "code-block" rather than introducing our own "code-tab" (?)
• allow tabs other than code-blocks (maybe)