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/pull/4819#issuecomment-762630904,https://api.github.com/repos/pydata/xarray/issues/4819,762630904,MDEyOklzc3VlQ29tbWVudDc2MjYzMDkwNA==,5635139,2021-01-19T06:28:36Z,2021-01-19T06:28:36Z,MEMBER,"Thanks for spotting these @keewis, sorry I missed them.

On the `sel` fallback to `isel`, though:

> I might be missing something, but I don't think `drop_sel` should work for dimensions without coordinates: `sel` as well as `drop_sel` work on labels, so they need the coordinates

I tend to agree, but `.sel` does fall back to `.isel` for dimensions without coordinates, so the now-current code is more consistent. What are your thoughts?

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