@omz - could you discuss what the background is with cffi and how it relates to the ctypes - ffi combination? I keep seeing references to it as an active project that makes writing the python code simpler somehow but does basically the same thing as ctypes and ffi in combination. Is this old stuff - or new? If new - maybe it solves the 64-bit issues already. Just curious.
UPDATE: I just noticed that cffi is included in Pythonista under pylib/site_packages along with a copy of pycparser. Interesting.