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  • xarray · 3 ✖
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
365367839 MDExOlB1bGxSZXF1ZXN0MjE5MzAzNTk0 2449 Add 'to_iris' and 'from_iris' to methods Dataset jacobtomlinson 1610850 closed 0     7 2018-10-01T09:02:26Z 2023-09-18T09:33:53Z 2023-09-18T09:33:53Z CONTRIBUTOR   0 pydata/xarray/pulls/2449

This PR adds to_iris and from_iris methods to DataSet. I've added this because I frequently find myself writing little list and dictionary comprehensions to pack and unpack both DataSets from DataArrays and Iris CubeLists from Cubes.

  • [x] Tests added (for all bug fixes or enhancements)
  • [ ] Tests passed (for all non-documentation changes)
  • [x] Fully documented, including whats-new.rst for all changes and api.rst for new API 
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     xarray 13221727 pull
658374300 MDExOlB1bGxSZXF1ZXN0NDUwMzQ1MDgy 4232 Support cupy in as_shared_dtype jacobtomlinson 1610850 closed 0     1 2020-07-16T16:52:30Z 2020-07-27T10:32:48Z 2020-07-24T20:38:58Z CONTRIBUTOR   0 pydata/xarray/pulls/4232

This implements solution 2 for #4231.

cc @quasiben

  • [x] Closes #4231
  • [x] Tests added
  • [x] Passes isort -rc . && black . && mypy . && flake8
 
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     xarray 13221727 pull
654678508 MDExOlB1bGxSZXF1ZXN0NDQ3MzU2ODAw 4214 Add initial cupy tests jacobtomlinson 1610850 closed 0     8 2020-07-10T10:20:33Z 2020-07-13T16:32:35Z 2020-07-13T15:07:45Z CONTRIBUTOR   0 pydata/xarray/pulls/4214

Added some initial unit tests for cupy. Mainly to create a place for cupy tests to go and to check some basic functionality.

I've created a fixture which constructs the dataset from the Toy weather data example and converts the underlying arrays to cupy. Then I've added a test which checks that after calling operations such as mean and groupby the resulting DataArray is still backed by a cupy array.

The main penalty with working on GPUs is accidentally shunting data back and forth between the GPU and system memory. Copying data over the PCI bus is slow compared to the rest of the work so should be avoided. So this first test is checking that we are leaving things on the GPU.

Because this data copying is so expensive cupy have intentionally broken the __array__ method and introduced a .get method instead. This means that users have to be explicit in converting back to numpy and copying back to the main memory. Therefore we will need to add some logic to xarray to use .get in appropriate situations such as plotting.

  • [x] Releated to #4212
  • [x] Tests added
  • [x] Passes isort -rc . && black . && mypy . && flake8
 
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     xarray 13221727 pull

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