diff options
Diffstat (limited to 'Lib')
| -rw-r--r-- | Lib/datetime.py | 6 | ||||
| -rw-r--r-- | Lib/test/datetimetester.py | 6 |
2 files changed, 11 insertions, 1 deletions
diff --git a/Lib/datetime.py b/Lib/datetime.py index 47e54ec235..1ae7cb5305 100644 --- a/Lib/datetime.py +++ b/Lib/datetime.py @@ -485,7 +485,11 @@ class timedelta: def __sub__(self, other): if isinstance(other, timedelta): - return self + -other + # for CPython compatibility, we cannot use + # our __class__ here, but need a real timedelta + return timedelta(self._days - other._days, + self._seconds - other._seconds, + self._microseconds - other._microseconds) return NotImplemented def __rsub__(self, other): diff --git a/Lib/test/datetimetester.py b/Lib/test/datetimetester.py index e9ceee6d96..38f3b8f19b 100644 --- a/Lib/test/datetimetester.py +++ b/Lib/test/datetimetester.py @@ -383,6 +383,12 @@ class TestTimeDelta(HarmlessMixedComparison, unittest.TestCase): for i in range(-10, 10): eq((i*us/-3)//us, round(i/-3)) + # Issue #11576 + eq(td(999999999, 86399, 999999) - td(999999999, 86399, 999998), + td(0, 0, 1)) + eq(td(999999999, 1, 1) - td(999999999, 1, 0), + td(0, 0, 1)) + def test_disallowed_computations(self): a = timedelta(42) |