html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/issues/1126#issuecomment-260999065,https://api.github.com/repos/pydata/xarray/issues/1126,260999065,MDEyOklzc3VlQ29tbWVudDI2MDk5OTA2NQ==,1217238,2016-11-16T16:41:08Z,2016-11-16T16:41:08Z,MEMBER,"I agree, this is annoying. Unfortunately, pandas does not have support a MultiIndex with one level, so it's not obvious how we would represent such objects in xarray's data model. If we simply treated `ds.stack(z=['dim1'])` as a rename operation, then we wouldn't know how to do `unstack('z')`.

One option would be to use a normal `pandas.Index` where `Index.name` differs from the name of the dimension on the `xarray.Variable`, though it might be cleaner/more-obvious using our own wrapper class of some sort. I think this would be relatively sane, but it would require adjustments throughout the codebase in every place where we use a `MultiIndex`.
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