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  • Feature to retrieve the underlying store · 5 ✖
id html_url issue_url node_id user created_at updated_at ▲ author_association body reactions performed_via_github_app issue
830746640 https://github.com/pydata/xarray/issues/5175#issuecomment-830746640 https://api.github.com/repos/pydata/xarray/issues/5175 MDEyOklzc3VlQ29tbWVudDgzMDc0NjY0MA== shoyer 1217238 2021-05-02T05:34:35Z 2021-05-02T05:34:35Z MEMBER

@skorper Could you kindly explain your use-case here? Why it is useful for you to retrieve underlying stores? :)

This has never been part of Xarray's supported public API, and unless that changes the present work-around could break again in the future without warning.

 
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   Feature to retrieve the underlying store 860180906
822377249 https://github.com/pydata/xarray/issues/5175#issuecomment-822377249 https://api.github.com/repos/pydata/xarray/issues/5175 MDEyOklzc3VlQ29tbWVudDgyMjM3NzI0OQ== alexamici 226037 2021-04-19T10:56:01Z 2021-04-19T10:56:01Z MEMBER

@kmuehlbauer precisely. For example the AbstractDataStore is not part of the API anymore and it is kept only for backward compatibility.

What I see missing is a way defined at API level for the backends to "attach" arbitrary information and possibly code to the backend Datasets. cc @shoyer @jhamman 

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   Feature to retrieve the underlying store 860180906
822142644 https://github.com/pydata/xarray/issues/5175#issuecomment-822142644 https://api.github.com/repos/pydata/xarray/issues/5175 MDEyOklzc3VlQ29tbWVudDgyMjE0MjY0NA== skorper 11022336 2021-04-19T03:34:38Z 2021-04-19T03:34:38Z NONE

Thanks @kmuehlbauer! That works great for now. 

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   Feature to retrieve the underlying store 860180906
821854599 https://github.com/pydata/xarray/issues/5175#issuecomment-821854599 https://api.github.com/repos/pydata/xarray/issues/5175 MDEyOklzc3VlQ29tbWVudDgyMTg1NDU5OQ== kmuehlbauer 5821660 2021-04-17T17:04:48Z 2021-04-17T17:04:48Z MEMBER

@skorper So, the workaround would be something along the lines:

```python

dataset = xr.open_dataset('/path/to/file.nc') nc_dataset = dataset._close.self.ds type(nc_dataset) <class 'netCDF4._netCDF4.Dataset'> ```

But note, this only works if the dataset was opened/created from a single source file. And I'm not sure, if this is wanted behaviour.

@alexamici can possibly answer your question, if such API would be possible. To my understanding the backend refactor also did a great deal to disentangle Datasets from the underlying data sources. Please correct me @alexamici, if I'm wrong. 

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   Feature to retrieve the underlying store 860180906
821784136 https://github.com/pydata/xarray/issues/5175#issuecomment-821784136 https://api.github.com/repos/pydata/xarray/issues/5175 MDEyOklzc3VlQ29tbWVudDgyMTc4NDEzNg== kmuehlbauer 5821660 2021-04-17T07:49:41Z 2021-04-17T07:49:41Z MEMBER

AFAICT you could try to use ds._close to get the closing function(s) of the underlying file managers. Not sure if you then can lookup their parent-store(s) .

But you could open the store yourself, keep the reference and load it into a Dataset. Not sure if this would work for your use case, though. 

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   Feature to retrieve the underlying store 860180906

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