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Accounting for NoneType coordinates in attrs/encoding #359

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merged 3 commits into from
Aug 15, 2022
Merged

Accounting for NoneType coordinates in attrs/encoding #359

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ed4000e
Accounting for NoneType coordinates in attrs/encoding
sol1105 Aug 15, 2022
ec7b470
Added comment about NoneType coordinates attribute
sol1105 Aug 15, 2022
7bbb603
Replaced set by ChainMap in accessor._get_axis_coord
sol1105 Aug 15, 2022
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6 changes: 3 additions & 3 deletions cf_xarray/accessor.py
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Original file line number Diff line number Diff line change
Expand Up @@ -254,9 +254,9 @@ def _get_axis_coord(obj: DataArray | Dataset, key: str) -> list[str]:
)

search_in = set()
if "coordinates" in obj.encoding:
if "coordinates" in obj.encoding and obj.encoding["coordinates"]:
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search_in.update(obj.encoding["coordinates"].split(" "))
if "coordinates" in obj.attrs:
if "coordinates" in obj.attrs and obj.attrs["coordinates"]:
search_in.update(obj.attrs["coordinates"].split(" "))
if not search_in:
search_in = set(obj.coords)
Expand Down Expand Up @@ -1596,7 +1596,7 @@ def get_associated_variable_names(
coords: dict[str, list[str]] = {k: [] for k in keys}
attrs_or_encoding = ChainMap(self._obj[name].attrs, self._obj[name].encoding)

if "coordinates" in attrs_or_encoding:
if "coordinates" in attrs_or_encoding and attrs_or_encoding["coordinates"]:
coords["coordinates"] = attrs_or_encoding["coordinates"].split(" ")

if "cell_measures" in attrs_or_encoding:
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8 changes: 8 additions & 0 deletions cf_xarray/tests/test_accessor.py
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Expand Up @@ -298,6 +298,14 @@ def test_accessor_getattr_and_describe():
assert str(ds_verta.cf) == str(ds_vertb.cf)


def test_accessor_getattr_coordinate_Nonetype():
ds_vert = vert
ds_vert["o3"].encoding["coordinates"] = None
assert ds_vert.o3.cf["latitude"].name == "lat"
ds_vert["lat"].encoding["coordinates"] = None
assert ds_vert.cf["latitude"].name == "lat"


def test_getitem_standard_name():
actual = airds.cf["air_temperature"]
expected = airds["air"]
Expand Down