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issues: 654135405

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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
654135405 MDU6SXNzdWU2NTQxMzU0MDU= 4212 Add cupy support 1610850 open 0     7 2020-07-09T15:06:37Z 2021-02-08T16:50:38Z   CONTRIBUTOR      

I'm intending on working on cupy support in xarray along with @quasiben. Thanks for the warm welcome in the xarray dev meeting yesterday!

I'd like to use this issue to track cupy support and discuss certain design decisions. I appreciate there are also issues such as #4208, #3484 and #3232 which are related to cupy support, but maybe this could represent an umbrella issue for cupy specifically.

The main goal here is to improve support for array types other than numpy and dask in general. However, it is likely there will need to be some cupy specific compatibility code in xarray. (@andersy005 raised issues with calling __array__ on cupy in #3232 for example).

I would love to hear from folks wanting to use cupy with xarray to help build up some use cases for us to develop against. We have some ideas but more are welcome.

My first steps here will be to add some tests which use cupy. These will skip in the main CI but we will also look at running xarray tests on some GPU CI too as we develop. A few limited experiments that I've run seem to work, so I'll start with tests which reproduce those.

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