issue_comments: 420084948

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https://github.com/pydata/xarray/issues/1613#issuecomment-420084948 https://api.github.com/repos/pydata/xarray/issues/1613 420084948 MDEyOklzc3VlQ29tbWVudDQyMDA4NDk0OA== 98330 2018-09-10T22:40:15Z 2018-09-10T22:41:58Z NONE

The justification for this logic is that sel/loc would work like normal indexing [] on a Python list, and if you supply slice limits in the opposite order on a Python list, you get an empty result.

Given that sel is label/value-based, I don't see how the analogy with positional list-based indexing applies. This behavior looks like a functional bug. If you have decided to keep it as is, I'd suggest at the very least to add a warning if an empty dataset is returned because values in an attribute are ordered high...low.

EDIT: also then best to close this issue as wontfix

 
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