issue_comments: 683980088

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https://github.com/pydata/xarray/issues/4393#issuecomment-683980088 https://api.github.com/repos/pydata/xarray/issues/4393 683980088 MDEyOklzc3VlQ29tbWVudDY4Mzk4MDA4OA== 2448579 2020-08-31T19:20:44Z 2020-08-31T19:20:44Z MEMBER

I think this is #2180; see https://github.com/pydata/xarray/issues/2180#issuecomment-391932929 . Basically the RHS is prioritized and the x variable gets overwritten with the version of x on the RHS.

You can avoid this by going the Variable route instead of the DataArray route:ds["y"] = ("x", range(len(ds.x))) https://xarray.pydata.org/en/stable/data-structures.html#creating-a-dataset

 
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