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| author | Victor Stinner <victor.stinner@gmail.com> | 2015-09-18 12:42:05 (GMT) |
|---|---|---|
| committer | Victor Stinner <victor.stinner@gmail.com> | 2015-09-18 12:42:05 (GMT) |
| commit | 511491ade0bb77febb176bc75f049797f0c71ed0 (patch) | |
| tree | 1981db4c2c00eef86f32c03589174f98e46df857 /Misc | |
| parent | e3bcbd2bbade81a3591d69f607e1722c6016a489 (diff) | |
| download | cpython-511491ade0bb77febb176bc75f049797f0c71ed0.zip cpython-511491ade0bb77febb176bc75f049797f0c71ed0.tar.gz cpython-511491ade0bb77febb176bc75f049797f0c71ed0.tar.bz2 | |
Issue #23517: Fix rounding in fromtimestamp() and utcfromtimestamp() methods
of datetime.datetime: microseconds are now rounded to nearest with ties going
to nearest even integer (ROUND_HALF_EVEN), instead of being rounding towards
zero (ROUND_DOWN). It's important that these methods use the same rounding
mode than datetime.timedelta to keep the property:
(datetime(1970,1,1) + timedelta(seconds=t)) == datetime.utcfromtimestamp(t)
It also the rounding mode used by round(float) for example.
Add more unit tests on the rounding mode in test_datetime.
Diffstat (limited to 'Misc')
| -rw-r--r-- | Misc/NEWS | 8 |
1 files changed, 8 insertions, 0 deletions
@@ -81,6 +81,14 @@ Core and Builtins Library ------- +- Issue #23517: Fix rounding in fromtimestamp() and utcfromtimestamp() methods + of datetime.datetime: microseconds are now rounded to nearest with ties + going to nearest even integer (ROUND_HALF_EVEN), instead of being rounding + towards zero (ROUND_DOWN). It's important that these methods use the same + rounding mode than datetime.timedelta to keep the property: + (datetime(1970,1,1) + timedelta(seconds=t)) == datetime.utcfromtimestamp(t). + It also the rounding mode used by round(float) for example. + - Issue #24684: socket.socket.getaddrinfo() now calls PyUnicode_AsEncodedString() instead of calling the encode() method of the host, to handle correctly custom string with an encode() method which doesn't |