Finding the source code for built-in Python functions?

Question

Is there a way to see how built in functions work in python? I don\'t mean just how to use them, but also how were they built, what is the code behind sorted

Answer 1

Quite an unknown resource is the Python Developer Guide.

In a (somewhat) recent GH issue, a new chapter was added for to address the question you're asking: CPython Source Code Layout. If something should change, that resource will also get updated.