I don't know how to fix the other 2:
Objects/fileobject.c: {"readinto", METH_OLDARGS,
This seems a simple case of replacing PyArg_Parse with PyArg_ParseTuple.
Python/sysmodule.c: {"exit", METH_OLDARGS,
This one *appears* tricky. But in fact, changing it to METH_VARARGS should work just as well (I think).
nis should be testable by someone.
Or deprecated. I've never met somebody who used it.
On a related note, PyArg_GetInt() macro is used exactly one time-- in socketmodule.c There seem to be many more places where this could be used. Should I use or remove the macro? Or doc that it should not be used?
It's deprecated, just as PyArg_NoArgs(). Now's a good time to get rid of the last usage instance. --Guido van Rossum (home page: http://www.python.org/~guido/)