issue_comments: 133078118

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https://github.com/pydata/xarray/issues/542#issuecomment-133078118 https://api.github.com/repos/pydata/xarray/issues/542 133078118 MDEyOklzc3VlQ29tbWVudDEzMzA3ODExOA== 1217238 2015-08-20T17:07:08Z 2015-08-20T17:07:08Z MEMBER

So the issue here is that xray needs to load some arrays into memory as numpy arrays (e.g., to do indexing), but dask arrays don't know how to interact with numpy arrays: https://github.com/blaze/dask/issues/290

You can work around this by manually rechunking:

python with xray.open_mfdataset(...) as ds: ds = ds.chunk() a = ds['x'] * ds['y']

Kind of awkward but it works for now.

 
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