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Fix for date offset strings with resample loffset #8422

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merged 3 commits into from
Nov 8, 2023
Merged

Fix for date offset strings with resample loffset #8422

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77a41a6
change back to using to_offset in first_items
kafitzgerald Nov 6, 2023
72f140b
add date offset to loffset test
kafitzgerald Nov 7, 2023
383bbd8
add to release notes
kafitzgerald Nov 7, 2023
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5 changes: 4 additions & 1 deletion xarray/core/resample_cftime.py
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Original file line number Diff line number Diff line change
Expand Up @@ -151,7 +151,10 @@ def first_items(self, index: CFTimeIndex):
f"Got {self.loffset}."
)

labels = labels + pd.to_timedelta(self.loffset)
if isinstance(self.loffset, datetime.timedelta):
labels = labels + self.loffset
else:
labels = labels + to_offset(self.loffset)

# check binner fits data
if index[0] < datetime_bins[0]:
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2 changes: 1 addition & 1 deletion xarray/tests/test_cftimeindex_resample.py
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Expand Up @@ -260,7 +260,7 @@ def test_timedelta_offset() -> None:
xr.testing.assert_identical(timedelta_result, string_result)


@pytest.mark.parametrize("loffset", ["12H", datetime.timedelta(hours=-12)])
@pytest.mark.parametrize("loffset", ["MS", "12H", datetime.timedelta(hours=-12)])
def test_resample_loffset_cftimeindex(loffset) -> None:
datetimeindex = pd.date_range("2000-01-01", freq="6H", periods=10)
da_datetimeindex = xr.DataArray(np.arange(10), [("time", datetimeindex)])
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