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Issue #23517: fromtimestamp() and utcfromtimestamp() methods of

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datetime.datetime now round microseconds to nearest with ties going to nearest
even integer (ROUND_HALF_EVEN), as round(float), instead of rounding towards
-Infinity (ROUND_FLOOR).

pytime API: replace _PyTime_ROUND_HALF_UP with _PyTime_ROUND_HALF_EVEN. Fix
also _PyTime_Divide() for negative numbers.

_PyTime_AsTimeval_impl() now reuses _PyTime_Divide() instead of reimplementing
rounding modes.
This commit is contained in:
Victor Stinner 2015-09-09 01:02:23 +02:00
parent 69cc487df4
commit 7667f58151
8 changed files with 148 additions and 185 deletions
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4
Lib/test/datetimetester.py
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@ -1874,7 +1874,7 @@ class TestDateTime(TestDate):
self.assertEqual(t, zero)
t = fts(-1/2**7)
self.assertEqual(t.second, 59)
self.assertEqual(t.microsecond, 992187)
self.assertEqual(t.microsecond, 992188)
t = fts(1e-7)
self.assertEqual(t, zero)
@ -1888,7 +1888,7 @@ class TestDateTime(TestDate):
self.assertEqual(t.microsecond, 0)
t = fts(1/2**7)
self.assertEqual(t.second, 0)
self.assertEqual(t.microsecond, 7813)
self.assertEqual(t.microsecond, 7812)
def test_insane_fromtimestamp(self):
# It's possible that some platform maps time_t to double,