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  • rabernat · 3 ✖

issue 1

  • `to_zarr` raises `ValueError: Invalid dtype` with `mode='a'` (but not with `mode='w'`) · 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
1065385198 https://github.com/pydata/xarray/issues/6345#issuecomment-1065385198 https://api.github.com/repos/pydata/xarray/issues/6345 IC_kwDOAMm_X84_gHzu rabernat 1197350 2022-03-11T18:41:11Z 2022-03-11T18:41:11Z MEMBER

It seems like what we really want to do is verify that the datatype of the appended data matches the data type on disk.

 
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   `to_zarr` raises `ValueError: Invalid dtype` with `mode='a'` (but not with `mode='w'`) 1164454058
1065350469 https://github.com/pydata/xarray/issues/6345#issuecomment-1065350469 https://api.github.com/repos/pydata/xarray/issues/6345 IC_kwDOAMm_X84_f_VF rabernat 1197350 2022-03-11T17:58:28Z 2022-03-11T17:58:28Z MEMBER

Thanks for reporting this @kmsampson. My feeling is that it is a bug...which we can hopefully fix pretty easily!

 
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   `to_zarr` raises `ValueError: Invalid dtype` with `mode='a'` (but not with `mode='w'`) 1164454058
1063401936 https://github.com/pydata/xarray/issues/6345#issuecomment-1063401936 https://api.github.com/repos/pydata/xarray/issues/6345 IC_kwDOAMm_X84_YjnQ rabernat 1197350 2022-03-09T21:43:49Z 2022-03-09T21:43:49Z MEMBER

The relevant code is here

https://github.com/pydata/xarray/blob/d293f50f9590251ce09543319d1f0dc760466f1b/xarray/backends/api.py#L1405-L1406

and here

https://github.com/pydata/xarray/blob/d293f50f9590251ce09543319d1f0dc760466f1b/xarray/backends/api.py#L1280-L1298

What I don't understand is why different validation is needed for the append scenario than for the the write scenario. @shoyer worked on this in #5252, so maybe he has some ideas.

 
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   `to_zarr` raises `ValueError: Invalid dtype` with `mode='a'` (but not with `mode='w'`) 1164454058

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