doc: codingstyle: Python coding style

Indicate that we follow PEP8 and PEP257.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/doc/develop/codingstyle.rst b/doc/develop/codingstyle.rst
index 1d5d019..3d05a6b 100644
--- a/doc/develop/codingstyle.rst
+++ b/doc/develop/codingstyle.rst
@@ -19,6 +19,10 @@
   applies only to Linux, not to U-Boot. Only large hunks which are copied
   unchanged from Linux may retain that comment format.
 
+* Python code shall conform to `PEP8 (Style Guide for Python Code)
+  <https://peps.python.org/pep-0008/>`_. Use `pylint
+  <https://github.com/pylint-dev/pylint>`_ for checking the code.
+
 * Use patman to send your patches (``tools/patman/patman -H`` for full
   instructions). With a few tags in your commits this will check your patches
   and take care of emailing them.
@@ -67,6 +71,9 @@
 <https://www.kernel.org/doc/html/latest/doc-guide/kernel-doc.html>`_
 documentation applies with no changes.
 
+Our Python code documentation follows `PEP257 (Docstring Conventions)
+<https://peps.python.org/pep-0257/>`_.
+
 Use structures for I/O access
 -----------------------------