issue_comments: 818821420

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https://github.com/pydata/xarray/issues/5148#issuecomment-818821420 https://api.github.com/repos/pydata/xarray/issues/5148 818821420 MDEyOklzc3VlQ29tbWVudDgxODgyMTQyMA== 367900 2021-04-13T15:20:50Z 2021-04-13T15:29:54Z CONTRIBUTOR

I've changed the title.

I think improving the error message is the way to go.

Agreed. ~~Just playing with it, the attributes also need to be strings for netCDF (I'm not familiar with the other backends) so an equivalent error message should be added for them.~~ There is already a good error message for attributes, at least for netCDF, I wasn't looking at it properly.

 
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