Now at http://pyfaq.infogami.com/suggest we have:
FAQ: How do I declare that CTypes function returns void? A: c_void = None is not doc'ed, but is suggested by: >>> ctypes.POINTER(None) <class 'ctypes.c_void_p'> >>> Remembering c_void = c_int from K&R C often works, but if you say a restype is c_int, then doctest's of that call will print an int, yuck. If you say the restype is None, then those doctest's work: they print nothing. Hope this helps, -- http://mail.python.org/mailman/listinfo/python-list