Negative limit for traceback.*

I'd like to propose adding the ability to extract last n stack trace entries from a traceback using functions from traceback module. Simply put, passing limit=-n would make functions to return (or print or yield) last abs(n) entries. No-brainer implementation for extract_tb: extracted = list(_extract_tb_iter(tb, limit=(limit, None)[limit < 0])) if limit is not None and limit < 0: return extracted[limit:] return extracted The motivation: http://stackoverflow.com/q/25472412/2301450

I like this. It's kind of sad that when the limit causes truncation of the traceback it drops the most recent frames, which might give a hint as to what happens, and keeps the oldest frames, which are usually less interesting (I know my program started at main() :-). On Sun, Aug 24, 2014 at 10:48 AM, Thomas Allen <jsbfox@gmail.com> wrote:
-- --Guido van Rossum (python.org/~guido)

I like this. It's kind of sad that when the limit causes truncation of the traceback it drops the most recent frames, which might give a hint as to what happens, and keeps the oldest frames, which are usually less interesting (I know my program started at main() :-). On Sun, Aug 24, 2014 at 10:48 AM, Thomas Allen <jsbfox@gmail.com> wrote:
-- --Guido van Rossum (python.org/~guido)
participants (3)
-
Ethan Furman
-
Guido van Rossum
-
Thomas Allen