Example #1
0
    def test_subset(self):
        N = 10
        rng = date_range('1/1/1990', periods=N, freq='53s')
        df = DataFrame({'A': np.arange(N), 'B': np.arange(N)},
                       index=rng)
        df.loc[4:8, 'A'] = np.nan
        dates = date_range('1/1/1990', periods=N * 3,
                           freq='25s')

        # with a subset of A should be the same
        result = df.asof(dates, subset='A')
        expected = df.asof(dates)
        tm.assert_frame_equal(result, expected)

        # same with A/B
        result = df.asof(dates, subset=['A', 'B'])
        expected = df.asof(dates)
        tm.assert_frame_equal(result, expected)

        # B gives self.df.asof
        result = df.asof(dates, subset='B')
        expected = df.resample('25s', closed='right').ffill().reindex(dates)
        expected.iloc[20:] = 9

        tm.assert_frame_equal(result, expected)
Example #2
0
    def test_missing(self):
        # GH 15118
        # no match found - `where` value before earliest date in index
        N = 10
        rng = date_range('1/1/1990', periods=N, freq='53s')
        df = DataFrame({'A': np.arange(N), 'B': np.arange(N)},
                       index=rng)
        result = df.asof('1989-12-31')

        expected = Series(index=['A', 'B'], name=Timestamp('1989-12-31'))
        tm.assert_series_equal(result, expected)

        result = df.asof(to_datetime(['1989-12-31']))
        expected = DataFrame(index=to_datetime(['1989-12-31']),
                             columns=['A', 'B'], dtype='float64')
        tm.assert_frame_equal(result, expected)
Example #3
0
 def test_time_zone_aware_index(self, stamp, expected):
     # GH21194
     # Testing awareness of DataFrame index considering different
     # UTC and timezone
     df = DataFrame(data=[1, 2],
                    index=[Timestamp('2018-01-01 21:00:05.001+00:00'),
                           Timestamp('2018-01-01 22:35:10.550+00:00')])
     result = df.asof(stamp)
     tm.assert_series_equal(result, expected)