issue_comments: 1497686846

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https://github.com/pydata/xarray/pull/7561#issuecomment-1497686846 https://api.github.com/repos/pydata/xarray/issues/7561 1497686846 IC_kwDOAMm_X85ZROM- 2448579 2023-04-05T15:30:16Z 2023-04-05T15:30:16Z MEMBER

Variables don't have coordinates so that won't work.

mypy is correct here, it's a bug and we don't test for grouping by index variables. A commit reverting to the old len check would be great here, if you have the time.

It's not clear to me why we allow this actually. Seems like .groupby("DIMENSION") solves that use-case.

 
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