issues: 692016642

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id node_id number title user state locked assignee milestone comments created_at updated_at closed_at author_association active_lock_reason draft pull_request body reactions performed_via_github_app state_reason repo type
692016642 MDU6SXNzdWU2OTIwMTY2NDI= 4403 Add a callback/preprocess option to open_dataset 950575 closed 1     6 2020-09-03T14:21:58Z 2023-09-17T16:01:28Z 2023-09-17T16:01:28Z CONTRIBUTOR      

It is not uncommon to find datasets with bad metadata, like gregorian_proleptic instead of the expected prolepic_gregorian [1], that will prevent users from reading the full dataset. Ideally we could have a functionality similar to iris' callbacks [2] to workaround this. In fact, it looks like xarray already does something similar in the open_mfdataset but not for the open_dataset.

Pinging @dcherian who gave the idea of using preprocess and @rsignell-usgs who is a pro on finding bad metadata everywhere.

[1] https://nbviewer.jupyter.org/gist/rsignell-usgs/27ba1fdeb934d6fd5b83abe43098a047

[2] https://scitools.org.uk/iris/docs/latest/userguide/navigating_a_cube.html?highlight=callback#adding-and-removing-metadata-to-the-cube-at-load-time

 
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