test_resample.py 文件源码

def test_resample_to_quarterly(self):
        for month in MONTHS:
            ts = _simple_pts('1990', '1992', freq='A-%s' % month)
            quar_ts = ts.resample('Q-%s' % month).ffill()

            stamps = ts.to_timestamp('D', how='start')
            qdates = period_range(ts.index[0].asfreq('D', 'start'),
                                  ts.index[-1].asfreq('D', 'end'),
                                  freq='Q-%s' % month)

            expected = stamps.reindex(qdates.to_timestamp('D', 's'),
                                      method='ffill')
            expected.index = qdates

            assert_series_equal(quar_ts, expected)

        # conforms, but different month
        ts = _simple_pts('1990', '1992', freq='A-JUN')

        for how in ['start', 'end']:
            result = ts.resample('Q-MAR', convention=how).ffill()
            expected = ts.asfreq('Q-MAR', how=how)
            expected = expected.reindex(result.index, method='ffill')

            # .to_timestamp('D')
            # expected = expected.resample('Q-MAR').ffill()

            assert_series_equal(result, expected)