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- from datetime import timedelta
- from pandas import (
- Index,
- Timestamp,
- date_range,
- isna,
- )
- import pandas._testing as tm
- class TestAsOf:
- def test_asof_partial(self):
- index = date_range("2010-01-01", periods=2, freq="m")
- expected = Timestamp("2010-02-28")
- result = index.asof("2010-02")
- assert result == expected
- assert not isinstance(result, Index)
- def test_asof(self):
- index = tm.makeDateIndex(100)
- dt = index[0]
- assert index.asof(dt) == dt
- assert isna(index.asof(dt - timedelta(1)))
- dt = index[-1]
- assert index.asof(dt + timedelta(1)) == dt
- dt = index[0].to_pydatetime()
- assert isinstance(index.asof(dt), Timestamp)
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