New submission from Daniele Varrazzo <daniele.varra...@gmail.com>:
I found two datetimes at difference timezone whose difference is 0 but which don't compare equal. Python 3.9.5 (default, May 12 2021, 15:26:36) [GCC 8.3.0] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import datetime as dt >>> from zoneinfo import ZoneInfo >>> for i in range(3): ... ref = dt.datetime(5327 + i, 10, 31, tzinfo=dt.timezone.utc) ... print(ref.astimezone(ZoneInfo(key='Europe/Rome')) == ref.astimezone(dt.timezone(dt.timedelta(seconds=3600)))) ... True False True >>> for i in range(3): ... ref = dt.datetime(5327 + i, 10, 31, tzinfo=dt.timezone.utc) ... print(ref.astimezone(ZoneInfo(key='Europe/Rome')) - ref.astimezone(dt.timezone(dt.timedelta(seconds=3600)))) ... 0:00:00 0:00:00 0:00:00 Is this a float rounding problem? If so I think it should be documented that datetimes bewhave like floats instead of like Decimal, although they have finite precision. ---------- components: Library (Lib) messages: 403059 nosy: piro priority: normal severity: normal status: open title: datetime subject to rounding? versions: Python 3.8, Python 3.9 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue45347> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
