We use the Sphinx toolchain to transform the Python docstrings into HTMLs. This is as simple as:

Set TAICHI_PATH to the root of the Taichi repo.

Run the following:

pip install -r requirements.txt
cd experimental/
make html

Then go to _build/html and open index.html in your browser, i.e. open _build/html/index.html.

References

sphinx-autodoc: This extension can import the modules you are documenting, and pull in documentation from docstrings in a semi-automatic way.
sphinx.ext.napoleon: This is for parsing the Google-style (Numpy-style as well) Python docstring.
sphinx-rtd-theme: Additional Sphinx themes.
sphinx-autoapi: "real" auto-generation of APIs.