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gh-88994: Change datetime.now to half-even rounding for consistency with datetime.fromtimestamp. #134258

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Merged
merged 5 commits into from
May 19, 2025
Merged

gh-88994: Change datetime.now to half-even rounding for consistency with datetime.fromtimestamp. #134258

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494b04f
Change `datetime.now` to half-even rounding for consistency with `dat…
jhohm May 19, 2025
6b53c73
📜🤖 Added by blurb_it.
blurb-it[bot] May 19, 2025
654fcc4
Fix func references in NEWS blurb to qualify `datetime` module contents.
jhohm May 19, 2025
84c6755
Add jhohm to ACKS and note as author of patch
jhohm May 19, 2025
15a97fd
Conform to PEP 7 on changed line.
jhohm May 19, 2025
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1 change: 1 addition & 0 deletions Misc/ACKS
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Original file line number Diff line number Diff line change
Expand Up @@ -795,6 +795,7 @@ Albert Hofkamp
Chris Hogan
Tomas Hoger
Jonathan Hogg
John Keith Hohm
Vladyslav Hoi
Kamilla Holanda
Steve Holden
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3 changes: 3 additions & 0 deletions Misc/NEWS.d/next/Library/2025-05-19-18-12-42.gh-issue-88994.7avvVu.rst
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@@ -0,0 +1,3 @@
Change :func:`datetime.datetime.now` to half-even rounding for
consistency with :func:`datetime.datetime.fromtimestamp`. Patch by
John Keith Hohm.
2 changes: 1 addition & 1 deletion Modules/_datetimemodule.c
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Expand Up @@ -5539,7 +5539,7 @@ datetime_best_possible(PyObject *cls, TM_FUNC f, PyObject *tzinfo)
time_t secs;
int us;

if (_PyTime_AsTimevalTime_t(ts, &secs, &us, _PyTime_ROUND_FLOOR) < 0)
if (_PyTime_AsTimevalTime_t(ts, &secs, &us, _PyTime_ROUND_HALF_EVEN) < 0)
return NULL;
assert(0 <= us && us <= 999999);

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