test_timeseries.py 文件源码

def test_sort_values(self):
        idx = DatetimeIndex(['2000-01-04', '2000-01-01', '2000-01-02'])

        ordered = idx.sort_values()
        self.assertTrue(ordered.is_monotonic)

        ordered = idx.sort_values(ascending=False)
        self.assertTrue(ordered[::-1].is_monotonic)

        ordered, dexer = idx.sort_values(return_indexer=True)
        self.assertTrue(ordered.is_monotonic)
        self.assert_numpy_array_equal(dexer, [1, 2, 0])

        ordered, dexer = idx.sort_values(return_indexer=True, ascending=False)
        self.assertTrue(ordered[::-1].is_monotonic)
        self.assert_numpy_array_equal(dexer, [0, 2, 1])