Hello people! I'm following the issue 1259 (http://bugs.python.org/issue1259) It basically says that this should be ok: "'asd'.find('s', None, None)", as the documentation says that "start" and "end" arguments behaves like in slices (right now it gives a TypeError). I created a patch, that solves the problem presented in that patch, as is suggested by Barry A. Warsaw. The patch touches three files: - Lib/test/string_tests.py: The test cases for this. - Objects/stringobject.c: Here I modified the string_find_internal() function, for PyArg_ParseTuple to not call directly to PyEval_SliceIndex: I just call it if the function received an argument and is not None. - Objects/unicodeobject.c: Here I needed to make the same in unicode_find(), unicode_rfind(), unicode_index(), and unicode_rindex(), so I created another function called _ParseTupleFinds(), for this family of functions, which handles the arguments and returns the needed info for each function. All the tests pass ok, I'm sending this mail to see if anybody could please review the patch before I apply it, as this is the first patch that I create in C. Feel free to ignore this mail if the patch is ok, :) Regards, -- . Facundo Blog: http://www.taniquetil.com.ar/plog/ PyAr: http://www.python.org/ar/