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issue 1

  • xr.testing.assert_equal does not test for dtype · 4 ✖

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id html_url issue_url node_id user created_at updated_at ▲ author_association body reactions performed_via_github_app issue
751843789 https://github.com/pydata/xarray/issues/4727#issuecomment-751843789 https://api.github.com/repos/pydata/xarray/issues/4727 MDEyOklzc3VlQ29tbWVudDc1MTg0Mzc4OQ== max-sixty 5635139 2020-12-28T19:50:17Z 2020-12-28T19:50:17Z MEMBER

I agree with @toddrjen that the words of assert_identical strongly suggest that the dtypes would be checked.

I would suggest we either: - Fail on different dtypes in 0.17 - If there are lots of breaks / downstream libraries that may break: add a FutureWarning on different dtypes and change in the future

Happy to help on this!

 
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   xr.testing.assert_equal does not test for dtype 773750763
750926206 https://github.com/pydata/xarray/issues/4727#issuecomment-750926206 https://api.github.com/repos/pydata/xarray/issues/4727 MDEyOklzc3VlQ29tbWVudDc1MDkyNjIwNg== mathause 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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   xr.testing.assert_equal does not test for dtype 773750763
750386723 https://github.com/pydata/xarray/issues/4727#issuecomment-750386723 https://api.github.com/repos/pydata/xarray/issues/4727 MDEyOklzc3VlQ29tbWVudDc1MDM4NjcyMw== keewis 14808389 2020-12-23T16:56:11Z 2020-12-23T17:04:12Z MEMBER 
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   xr.testing.assert_equal does not test for dtype 773750763
750354606 https://github.com/pydata/xarray/issues/4727#issuecomment-750354606 https://api.github.com/repos/pydata/xarray/issues/4727 MDEyOklzc3VlQ29tbWVudDc1MDM1NDYwNg== dcherian 2448579 2020-12-23T15:40:07Z 2020-12-23T15:40:07Z MEMBER

+1 on adding check_dtype. I think it should be default False for assert_equal.

It could be default True for assert_identical but this would be very backward incompatible.

 
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   xr.testing.assert_equal does not test for dtype 773750763

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