issue_comments: 1263548977

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https://github.com/pydata/xarray/issues/7108#issuecomment-1263548977 https://api.github.com/repos/pydata/xarray/issues/7108 1263548977 IC_kwDOAMm_X85LUDox 4160723 2022-09-30T13:03:26Z 2022-09-30T13:03:26Z MEMBER

It looks like the error is because of the non-monotonic coordinate labels for the "lon" coordinate in nc_bug rather than a float precision issue. The "lon" coordinate seems monotonic for nc_ok so it works.

When a slice is given as indexer, Xarray internally calls pandas.Index.slice_indexer(), which requires that the index must be ordered and unique (docs). Unfortunately, Pandas does not mention it while it raises a KeyError. Should we first check the index in Xarray and raise a nicer error message if it is not unique / ordered?

 
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