changeset:   97569:b690bf218702
user:        Victor Stinner <victor.stinner@gmail.com>
date:        Wed Sep 02 01:57:23 2015 +0200
files:       Misc/NEWS Modules/_datetimemodule.c
description:
Issue #23517: datetime.datetime.fromtimestamp() and
datetime.datetime.utcfromtimestamp() now rounds to nearest with ties going away
from zero, instead of rounding towards minus infinity (-inf), as Python 2 and
Python older than 3.3.


diff -r abeb625b20c2 -r b690bf218702 Misc/NEWS
--- a/Misc/NEWS	Wed Sep 02 01:43:56 2015 +0200
+++ b/Misc/NEWS	Wed Sep 02 01:57:23 2015 +0200
@@ -17,6 +17,11 @@
 Library
 -------
 
+- Issue #23517: datetime.datetime.fromtimestamp() and
+  datetime.datetime.utcfromtimestamp() now rounds to nearest with ties going
+  away from zero, instead of rounding towards minus infinity (-inf), as Python
+  2 and Python older than 3.3.
+
 - Issue #23552: Timeit now warns when there is substantial (4x) variance
   between best and worst times. Patch from Serhiy Storchaka.
 
diff -r abeb625b20c2 -r b690bf218702 Modules/_datetimemodule.c
--- a/Modules/_datetimemodule.c	Wed Sep 02 01:43:56 2015 +0200
+++ b/Modules/_datetimemodule.c	Wed Sep 02 01:57:23 2015 +0200
@@ -4098,7 +4098,7 @@
     long us;
 
     if (_PyTime_ObjectToTimeval(timestamp,
-                                &timet, &us, _PyTime_ROUND_FLOOR) == -1)
+                                &timet, &us, _PyTime_ROUND_HALF_UP) == -1)
         return NULL;
 
     return datetime_from_timet_and_us(cls, f, timet, (int)us, tzinfo);