I noticed that Vajrasky Kok is very active on bugs.python.org. He produced many patches and contribued to various modules written in Python and C.
Search "Vajrasky Kok" in the Mercurial history to see how many contributions he made recently. On http://bugs.python.org his nickname is "vajrasky".
He knows the process of review and update his patch when he got remarks.
If you consider that he needs a mentor, I can be his mentor.