Python for Data Analysis book: what's the right quarto code link?

[aborruso]

Hi,
in Creating a Book quarto webpage there are 3 example books.

One of this is Python for Data Analysis and the URL for the code page is this https://github.com/wesm/pydata-book/tree/3rd-edition

Opening it I do not see any quarto code, any quarto config file.

Where can I find them?

Thank you