You cannot run all legit Python 1.6 code on Python 2.6 (except perhaps with special flags). If Python 2.6 would flawlessly execute all Python 1.6 code I would

You cannot run all legit Python 1.6 code on Python 2.6 (except perhaps with special flags). If Python 2.6 would flawlessly execute all Python 1.6 code I would have no complaint.