Bugs item #1721372, was opened at 2007-05-18 10:10 Message generated for change (Comment added) made by aisaac0 You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1721372&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: Documentation Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: Alan (aisaac0) Assigned to: Nobody/Anonymous (nobody) Summary: emphasize iteration volatility for set Initial Comment: For <URL:http://docs.python.org/lib/types-set.html>, append the following new sentence to the 2nd paragraph. Iteration over a set returns elements in an indeterminate order, which generally depends on factors outside the scope of the containing program. *Justification:* users should not be expected to understand without being told that iteration order depends on factors outside the scope of the containing program. (Additionally, unlike the documentation for dictionaries, the documentation for sets fails to give a serious warning not to rely on iteration order.) ---------------------------------------------------------------------- >Comment By: Alan (aisaac0) Date: 2007-05-18 13:00 Message: Logged In: YES user_id=1025672 Originator: YES Location in memory. See Peter Otten's discussion at http://www.thescripts.com/forum/post2552380-16.html ---------------------------------------------------------------------- Comment By: Martin v. Löwis (loewis) Date: 2007-05-18 12:05 Message: Logged In: YES user_id=21627 Originator: NO What factors outside the containing program influence iteration order? Iteration is completely deterministic, and only depends on the items inserted, and the order in which they were inserted, neither of which is outside the scope of the containing program. It's just that the order is not easily predictable. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1721372&group_id=5470 _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
