test_timedeltas.py 文件源码

def test_overflow(self):
        # GH 9442
        s = Series(pd.date_range('20130101', periods=100000, freq='H'))
        s[0] += pd.Timedelta('1s 1ms')

        # mean
        result = (s - s.min()).mean()
        expected = pd.Timedelta((pd.DatetimeIndex((s - s.min())).asi8 / len(s)
                                 ).sum())

        # the computation is converted to float so might be some loss of
        # precision
        self.assertTrue(np.allclose(result.value / 1000, expected.value /
                                    1000))

        # sum
        self.assertRaises(ValueError, lambda: (s - s.min()).sum())
        s1 = s[0:10000]
        self.assertRaises(ValueError, lambda: (s1 - s1.min()).sum())
        s2 = s[0:1000]
        result = (s2 - s2.min()).sum()