issues: 703881154

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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
703881154 MDExOlB1bGxSZXF1ZXN0NDg4OTA4MTI5 4432 Fix optimize for chunked DataArray 1312546 closed 0     8 2020-09-17T20:16:08Z 2020-09-18T13:20:45Z 2020-09-17T23:19:23Z MEMBER   0 pydata/xarray/pulls/4432

Previously we generated in invalidate Dask task graph, becuase the lines removed here dropped keys that were referenced elsewhere in the task graph. The original implementation had a comment indicating that this was to cull: https://github.com/pydata/xarray/blob/502a988ad5b87b9f3aeec3033bf55c71272e1053/xarray/core/variable.py#L384

Just spot-checking things, I think we're OK here though. Something like dask.visualize(arr[[0]], optimize_graph=True) indicates that we're OK.

  • [x] Closes #3698
  • [x] Tests added
  • [x] Passes isort . && black . && mypy . && flake8
  • [x] User visible changes (including notable bug fixes) are documented in whats-new.rst
  • [x] New functions/methods are listed in api.rst
 
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