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
299668148,MDU6SXNzdWUyOTk2NjgxNDg=,1938,Hooks for XArray operations,2190658,open,0,,,53,2018-02-23T10:37:43Z,2019-07-12T16:40:54Z,,MEMBER,,,,"In hope of cleaner dask and sparse support (pydata/sparse#1), I wanted to suggest hooks for XArray operations.

Something like the following:
```
try:
    import dask.array as da
    xarray.hooks.register('nansum', da.array, da.nansum)
    ...
except ImportError:
    pass


try:
    import sparse.SparseArray
    xarray.hooks.register('nansum', sparse.SparseArray, sparse.nansum)
    ...
except ImportError:
    pass
```

Functions would work something like the following:
(the register would fall back to Numpy if nothing is found)

- Check type of first/primary argument.
- Check register for function.
- Call function

I would argue that this should be in Numpy, but it's a huge project to put it there.","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/1938/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,issue