issue_comments: 569417459

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https://github.com/pydata/xarray/issues/3633#issuecomment-569417459 https://api.github.com/repos/pydata/xarray/issues/3633 569417459 MDEyOklzc3VlQ29tbWVudDU2OTQxNzQ1OQ== 35968931 2019-12-28T13:29:17Z 2019-12-28T13:29:17Z MEMBER

@willirath if the problem is that you don't know the dimensions of the dataset until after you've opened it, you could always open first then chunk afterwards, I think the result is the same: ```python chunks = {'x': 5}

ds = xr.open_dataset("example.nc")

if 'y' in ds.dims: chunks['y'] = 1

ds = ds.chunk(chunks=chunks) ```

 
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