Bugs item #1326277, was opened at 2005-10-13 23:27 Message generated for change (Comment added) made by phr You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1326277&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 Library Group: Python 2.4 Status: Open Resolution: None Priority: 5 Submitted By: paul rubin (phr) Assigned to: Nobody/Anonymous (nobody) Summary: itertools.count wraps around after maxint Initial Comment: See below. This goes against the notion of int/long unification and can cause weird unexpected behavior, almost like a buffer overflow. It should promote to a long at the appropriate time, or that's not feasible, then raise an exception, don't wrap around silently. Xrange is also not so great about this. It at least raises an exception if you give it too large an endpoint, but promoting to long would be better. Steven D'Aprano and others on clpy pointed this out. >>> from itertools import count >>> b=2**31 - 3 >>> c = count(b) >>> for i in range(5): ... print c.next() ... 2147483645 2147483646 2147483647 -2147483648 -2147483647 >>> ---------------------------------------------------------------------- >Comment By: paul rubin (phr) Date: 2005-10-13 23:29 Message: Logged In: YES user_id=72053 I forgot to say, the test example is Python 2.4.1 on linux. I don't know if 2.4.2 has a fix. I don't see anything about it in the database. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1326277&group_id=5470
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