Martin Panter added the comment: Patch ruling out the len(s) corner case. I use a modified version of Fumihiro’s suggestion. ---------- versions: +Python 3.6, Python 3.7 -Python 3.4 Added file: http://bugs.python.org/file45827/extended_slicing_docs.v2.diff _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue1446619> _______________________________________