Bugs item #1303928, was opened at 2005-09-25 15:06 Message generated for change (Comment added) made by birkenfeld You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1303928&group_id=5470
Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Python Interpreter Core Group: Python 2.4 >Status: Closed >Resolution: Invalid Priority: 5 Submitted By: David M. Beazley (beazley) Assigned to: Nobody/Anonymous (nobody) Summary: Extended slice bug (or feature?) Initial Comment: Consider a sequence: a = [1,2,3,4,5,6,7,8,9,10] Now, consider the following slices: b = a[:-5] # b gets [1,2,3,4,5] c = a[:-5:1] # c gets [1,2,3,4,5] d = a[:-5:-1] # d gets [10,9,8,7] Is this the intended behavior?? I would have suspected the value of d to be [5,4,3,2,1] (the same elements of c, but in reverse order). Thanks. -- Dave ---------------------------------------------------------------------- >Comment By: Reinhold Birkenfeld (birkenfeld) Date: 2005-09-25 15:16 Message: Logged In: YES user_id=1188172 No. With a step of -1, the slice always starts at the end (at 10). The stop (that is 6, in this case) is never included, and so you get your result. If you want [5,4,3,2,1], use a[:-5][::-1] or reversed(a[:-5]). PS: comp.lang.python is a better place to discuss whether something is really a bug. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1303928&group_id=5470 _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
