How to distinguish Python strings and docstrings in an emacs buffer?

Question

If I have just

(set-face-foreground 'font-lock-comment-face "red")
(set-face-foreground 'font-lock-string-face "green")

in my .emacs, emacs uses the same font-lock for Python strings and for Python docstrings.

What should I add to my .emacs so that comments, strings, and docstrings are distinguished?

This answer suggests that it is possible to do so.

Answer 1

Built-in python.el provides font-lock-doc-face via python-font-lock-syntactic-face-function.

python-mode.el uses font-lock-doc-face, given py-use-font-lock-doc-face-p is t. You can customize that variable.

Answer 2

The face used for doc strings should be font-lock-doc-face, so just customize it to look different.