New submission from George King: As of python3.6, passing None to the start/end parameters of `list.index` and `tuple.index` raises the following exception: "slice indices must be integers or None or have an __index__ method"
This suggests that the intent is to support None as a valid input. This would be quite useful for the end parameter, where the sensible default is len(self) rather than a constant. Note also that str, bytes, and bytearray all support None. I suggest that CPython be patched to support None for start/end. Otherwise, at the very least the exception message should be changed. Accepting None will make the optional start/end parameters for this method more consistent across the types, which is especially helpful when using type annotations / checking. ---------- messages: 290737 nosy: gwk priority: normal severity: normal status: open title: list and tuple index methods should accept None parameters _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue29935> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
