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  • aulemahal · 3 ✖

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  • map_blocks doesn't handle tranposed arrays · 3 ✖

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  • CONTRIBUTOR · 3 ✖
id html_url issue_url node_id user created_at updated_at ▲ author_association body reactions performed_via_github_app issue
843208815 https://github.com/pydata/xarray/issues/5326#issuecomment-843208815 https://api.github.com/repos/pydata/xarray/issues/5326 MDEyOklzc3VlQ29tbWVudDg0MzIwODgxNQ== aulemahal 20629530 2021-05-18T14:14:37Z 2021-05-18T14:14:37Z CONTRIBUTOR

Thanks everyone. Just to be clear, I am using map_blocks in a rather complicated way (way more than this MWE) and at the moment of the map_blocks call, the code doesn't know the dimension order of the output, only the names. Moreover, in this code, the wrapped functions are too complex for map_blocks to infer the template. The idea is that all wrapped funcs reduce some dims or add some other (but with known sizes), thus I can construct a template, but the dim order is uncertain.

However, I understand that it is expected from map_blocks that the result fits the template, so my expectation was not correct. I'll leave the "workaround" in my code and close this issue. Thanks!

 
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   map_blocks doesn't handle tranposed arrays 893692903
842678176 https://github.com/pydata/xarray/issues/5326#issuecomment-842678176 https://api.github.com/repos/pydata/xarray/issues/5326 MDEyOklzc3VlQ29tbWVudDg0MjY3ODE3Ng== aulemahal 20629530 2021-05-17T22:17:23Z 2021-05-17T22:17:23Z CONTRIBUTOR

Haha, sorry, I didn't explain this properly.

This MWE is just MWE. The use case I have of map_blocks is in a decorator. At the moment I write the map_blocks call, I do not know if func will transpose the result or not. In my case, the template is generated from a list of dimensions to reduce and new dimensions.

I realize this might be an edge case that is too narrow to merit a fix. I expected dimension order not to matter, as it is the case in most of xarray. Right now, my code wraps func in a another function that performs this tranpose when needed.

 
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   map_blocks doesn't handle tranposed arrays 893692903
842668943 https://github.com/pydata/xarray/issues/5326#issuecomment-842668943 https://api.github.com/repos/pydata/xarray/issues/5326 MDEyOklzc3VlQ29tbWVudDg0MjY2ODk0Mw== aulemahal 20629530 2021-05-17T21:56:35Z 2021-05-17T21:56:35Z CONTRIBUTOR

Hi @max-sixty, just edited the top comment to include the traceback.

The MWE does work with return d. 

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   map_blocks doesn't handle tranposed arrays 893692903

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