issues: 272002705

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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
272002705 MDU6SXNzdWUyNzIwMDI3MDU= 1698 apply_ufunc(dask='parallelized') to infer output_dtypes 6213168 open 0     3 2017-11-07T22:11:11Z 2019-10-22T08:33:38Z   MEMBER      

If one doesn't provide the dtype parameter to dask.map_blocks(), it automatically infers it by running the kernel on trivial dummy data. It should be straightforward to make xarray.apply_ufunc(dask='parallelized') use the same functionality if the output_dtypes parameter is omitted.

 
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     13221727 issue

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