I am actually -1 on the concept as well.  If you go to the trouble of having a skip singleton in the language, then partial application syntax should just be call syntax as in add(skip, 2). However this will not be python anymore.  Other languages that have partial application support use special syntax such as add(,2) or add(:,2).  Since adding syntax is out of the question, it is hard to argue that partial(add, partial.skip, 2) is so much better than lambda x: add(x,2).