Tim Peters added the comment: FYI, that invariant failed for me just now under the released 3.4.3 too:
Python 3.4.3 (v3.4.3:9b73f1c3e601, Feb 24 2015, 22:44:40) [MSC v.1600 64 bit (AMD64)] on win32 Type "help", "copyright", "credits" or "license" for more information. >>> from datetime import * >>> E = datetime(1970,1,1,tzinfo=timezone.utc) >>> s = -1/2**7 >>> datetime.fromtimestamp(s, timezone.utc) datetime.datetime(1969, 12, 31, 23, 59, 59, 992187, tzinfo=datetime.timezone.utc) >>> E + timedelta(seconds=s) datetime.datetime(1969, 12, 31, 23, 59, 59, 992188, tzinfo=datetime.timezone.utc) It's an exactly-tied rounding case for the exactly-representable-in-binary s = -0.0078125. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue23517> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
