issue_comments: 750926206

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https://github.com/pydata/xarray/issues/4727#issuecomment-750926206 https://api.github.com/repos/pydata/xarray/issues/4727 750926206 MDEyOklzc3VlQ29tbWVudDc1MDkyNjIwNg== 10194086 2020-12-24T16:51:42Z 2020-12-24T19:28:23Z MEMBER

There seems to be a subtle difference between comparing Dataset and DataArray.

DataArray compares coords:

https://github.com/pydata/xarray/blob/03d8d56c9b6d090f0de2475202368b08435eaeb5/xarray/core/dataarray.py#L2792

while Dataset compares _variables:

https://github.com/pydata/xarray/blob/03d8d56c9b6d090f0de2475202368b08435eaeb5/xarray/core/dataset.py#L1457-L1459

Thus once we compare xarray.core.variable.IndexVariable and once we compare xarray.core.dataarray.DataArray and the comparison takes different code paths...

```python import xarray as xr air = xr.tutorial.open_dataset("air_temperature")

type(air._variables["lat"])

xarray.core.variable.IndexVariable

type(air.air.coords["lat"])

xarray.core.dataarray.DataArray

```

edit: typo

 
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