[fix] avoid accessing potentially non-existing property supporting_arrays.

[fprill]

No description provided.

[FussyDuck]

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[JPXKQX]

Hello @fprill, the "supporting_arrays" property has been introduced as a new dataset property recently. I recommend incorporating it into your dataset if it is not already included.

update.

[MeraX]

Hi @JPXKQX , I might have missed an update, but I could not find this property it in the Anemoi Dataset data model documentation at https://confluence.ecmwf.int/display/MLPP/%5B4.4.2%5D+Define%2C+consolidate%2C+and+implement+the+Anemoi-Dataset+data+model . Could you update the documentation and explain the supporting_arrays property?

Is supporting_arrays actually necessary or could we make it optional to preserve backward compatibility?

[b8raoult]

@MeraX , the supporting_arrays is a method that will return a dictionary of numpy arrays to put in the checkpoint, The most important ones are latitudes and longitudes so that anemoi-inference can know the grid. Other arrays are mostly used for LAMs. anemoi-datasets and anemoi-training were updated in sync for that feature to work.

[fprill]

Hello, with the PR ecmwf/anemoi-datasets#170 this PR is now actually obsolete: The problem was that we previously had to apply version pinning to an older version for anemoi-datasets. Now the supporting_arrays property is available in our codebase, because with PR 170 we can use the current develop branch of anemoi-datasets.
Many thanks for the thorough reviewing and the quick support!