[issue29352] provide the authorative source for s[i:j] negative slice indices (<-len(s)) behavior for standard sequences

Change by Raymond Hettinger : -- resolution: -> out of date stage: -> resolved status: open -> closed ___ Python tracker ___ ___

[issue29352] provide the authorative source for s[i:j] negative slice indices (<-len(s)) behavior for standard sequences

Changes by Raymond Hettinger : -- assignee: docs@python -> rhettinger nosy: +rhettinger ___ Python tracker ___

[issue29352] provide the authorative source for s[i:j] negative slice indices (<-len(s)) behavior for standard sequences

Stephen J. Turnbull added the comment: I prefer Josh's wording. The important point to me is that >>> [1, 2][2:0] = "AB" [1, 2, "A", "B"] not an error or ["B", "A"] == [1, 2][2:0:-1]. I think too much talk about the endpoints obscures this important fact. (I think I'd like it to be an

[issue29352] provide the authorative source for s[i:j] negative slice indices (<-len(s)) behavior for standard sequences

Changes by Akira Li <4kir4...@gmail.com>: -- pull_requests: +576 ___ Python tracker ___ ___ Python-bugs-list

[issue29352] provide the authorative source for s[i:j] negative slice indices (<-len(s)) behavior for standard sequences

Akira Li added the comment: I prefer the wording in the current patch. Though I don't have strong feelings one way or the other as long as the behavior is specified explicitly. -- ___ Python tracker

[issue29352] provide the authorative source for s[i:j] negative slice indices (<-len(s)) behavior for standard sequences

Josh Rosenberg added the comment: I think the wording could be improved, but there is another option I wanted to put here. Right now, we're being overly detailed about the implementation, specifying the bounds substitutions performed. If we're just trying to describe logical behavior, we

[issue29352] provide the authorative source for s[i:j] negative slice indices (<-len(s)) behavior for standard sequences

New submission from Akira Li: I've failed to find where the behavior for negative indices in s[i:j] expression (i, j < -len(s)) for standard sequences (str, list, etc) is formally defined. The observed behavior implemented in PySlice_GetIndicesEx(): If "len(s) + i" or "len(s) + j" is negative,