test_algos.py 文件源码

def test_datetime64_dtype_array_returned(self):
        # GH 9431
        expected = np.array(['2015-01-03T00:00:00.000000000+0000',
                             '2015-01-01T00:00:00.000000000+0000'],
                            dtype='M8[ns]')

        dt_index = pd.to_datetime(['2015-01-03T00:00:00.000000000+0000',
                                   '2015-01-01T00:00:00.000000000+0000',
                                   '2015-01-01T00:00:00.000000000+0000'])
        result = algos.unique(dt_index)
        tm.assert_numpy_array_equal(result, expected)
        self.assertEqual(result.dtype, expected.dtype)

        s = pd.Series(dt_index)
        result = algos.unique(s)
        tm.assert_numpy_array_equal(result, expected)
        self.assertEqual(result.dtype, expected.dtype)

        arr = s.values
        result = algos.unique(arr)
        tm.assert_numpy_array_equal(result, expected)
        self.assertEqual(result.dtype, expected.dtype)