Sorting display by class using sphinx with 'autodoc'?

The autosummary extension, with the autosummary_generate configuration variable set to True, can be used to 1) generate compact summary listings and 2) generate class documentation with one page per class.

You have to explicitly specify each class to be included, but once this is done you have a setup for generating clear documentation where the classes are visually well separated.

The following markup will output one "stub" .rst page for each class (Class1, Class2, Class3). Each page is based on a template and includes an .. autoclass:: directive that extracts the full documentation. In the final HTML output, each class page is linked from the corresponding entry in the main autosummary table.

:mod:`mymodule` --- Some module
===============================

This module contains several classes. 

.. currentmodule:: mymodule

Class overview
--------------

.. autosummary::
   :toctree: stubs
   :template: class.rst

   Class1
   Class2
   Class3

Details here: https://www.sphinx-doc.org/en/master/usage/extensions/autosummary.html