test_timeseries.py 文件源码

def test_append_concat(self):
        rng = date_range('5/8/2012 1:45', periods=10, freq='5T')
        ts = Series(np.random.randn(len(rng)), rng)
        df = DataFrame(np.random.randn(len(rng), 4), index=rng)

        result = ts.append(ts)
        result_df = df.append(df)
        ex_index = DatetimeIndex(np.tile(rng.values, 2))
        self.assertTrue(result.index.equals(ex_index))
        self.assertTrue(result_df.index.equals(ex_index))

        appended = rng.append(rng)
        self.assertTrue(appended.equals(ex_index))

        appended = rng.append([rng, rng])
        ex_index = DatetimeIndex(np.tile(rng.values, 3))
        self.assertTrue(appended.equals(ex_index))

        # different index names
        rng1 = rng.copy()
        rng2 = rng.copy()
        rng1.name = 'foo'
        rng2.name = 'bar'
        self.assertEqual(rng1.append(rng1).name, 'foo')
        self.assertIsNone(rng1.append(rng2).name)