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Revert change 0eb8c182131e:

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"""Issue #23517: datetime.timedelta constructor now rounds microseconds to
nearest with ties going away from zero (ROUND_HALF_UP), as Python 2 and Python
older than 3.3, instead of rounding to nearest with ties going to nearest even
integer (ROUND_HALF_EVEN)."""

datetime.timedelta uses rounding mode ROUND_HALF_EVEN again.
This commit is contained in:
Victor Stinner 2015-09-08 23:58:54 +02:00
parent 1638bdfa1a
commit 69cc487df4
4 changed files with 36 additions and 15 deletions
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18
Lib/test/datetimetester.py
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@ -663,14 +663,16 @@ class TestTimeDelta(HarmlessMixedComparison, unittest.TestCase):
# Single-field rounding.
eq(td(milliseconds=0.4/1000), td(0)) # rounds to 0
eq(td(milliseconds=-0.4/1000), td(0)) # rounds to 0
eq(td(milliseconds=0.5/1000), td(microseconds=1))
eq(td(milliseconds=-0.5/1000), td(microseconds=-1))
eq(td(milliseconds=0.5/1000), td(microseconds=0))
eq(td(milliseconds=-0.5/1000), td(microseconds=-0))
eq(td(milliseconds=0.6/1000), td(microseconds=1))
eq(td(milliseconds=-0.6/1000), td(microseconds=-1))
eq(td(seconds=0.5/10**6), td(microseconds=1))
eq(td(seconds=-0.5/10**6), td(microseconds=-1))
eq(td(seconds=1/2**7), td(microseconds=7813))
eq(td(seconds=-1/2**7), td(microseconds=-7813))
eq(td(milliseconds=1.5/1000), td(microseconds=2))
eq(td(milliseconds=-1.5/1000), td(microseconds=-2))
eq(td(seconds=0.5/10**6), td(microseconds=0))
eq(td(seconds=-0.5/10**6), td(microseconds=-0))
eq(td(seconds=1/2**7), td(microseconds=7812))
eq(td(seconds=-1/2**7), td(microseconds=-7812))
# Rounding due to contributions from more than one field.
us_per_hour = 3600e6
@ -683,6 +685,10 @@ class TestTimeDelta(HarmlessMixedComparison, unittest.TestCase):
eq(td(hours=-.2/us_per_hour), td(0))
eq(td(days=-.4/us_per_day, hours=-.2/us_per_hour), td(microseconds=-1))
# Test for a patch in Issue 8860
eq(td(microseconds=0.5), 0.5*td(microseconds=1.0))
eq(td(microseconds=0.5)//td.resolution, 0.5*td.resolution//td.resolution)
def test_massive_normalization(self):
td = timedelta(microseconds=-1)
self.assertEqual((td.days, td.seconds, td.microseconds),