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  • xarray.open_dataset has issues if the dataset returned by the backend contains a multiindex · 3 ✖

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  • MEMBER · 3 ✖
id html_url issue_url node_id user created_at updated_at ▲ author_association body reactions performed_via_github_app issue
1272966573 https://github.com/pydata/xarray/issues/7139#issuecomment-1272966573 https://api.github.com/repos/pydata/xarray/issues/7139 IC_kwDOAMm_X85L3-2t benbovy 4160723 2022-10-10T08:35:22Z 2022-10-10T08:35:22Z MEMBER

Looks like the backend logic needs some updates to make it compatible with the new xarray data model with explicit indexes (i.e., possible indexed coordinates with name != dimension like for multi-index levels now), e.g., here:

https://github.com/pydata/xarray/blob/8eea8bb67bad0b5ac367c082125dd2b2519d4f52/xarray/backends/api.py#L234-L241

 
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   xarray.open_dataset has issues if the dataset returned by the backend contains a multiindex 1400949778
1271743751 https://github.com/pydata/xarray/issues/7139#issuecomment-1271743751 https://api.github.com/repos/pydata/xarray/issues/7139 IC_kwDOAMm_X85LzUUH dcherian 2448579 2022-10-07T15:29:50Z 2022-10-07T15:30:05Z MEMBER

I can see this type of decoding breaking some assumption in the file reading process. A full traceback would help identify where.

I think the real solution is actually #4490, so you could explicitly provide a coder.

 
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   xarray.open_dataset has issues if the dataset returned by the backend contains a multiindex 1400949778
1271555410 https://github.com/pydata/xarray/issues/7139#issuecomment-1271555410 https://api.github.com/repos/pydata/xarray/issues/7139 IC_kwDOAMm_X85LymVS benbovy 4160723 2022-10-07T12:55:17Z 2022-10-07T12:55:17Z MEMBER

Hi @lukasbindreiter, could you add the whole error traceback please?

 
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   xarray.open_dataset has issues if the dataset returned by the backend contains a multiindex 1400949778

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