issue_comments: 149987937

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https://github.com/pydata/xarray/issues/630#issuecomment-149987937 https://api.github.com/repos/pydata/xarray/issues/630 149987937 MDEyOklzc3VlQ29tbWVudDE0OTk4NzkzNw== 1217238 2015-10-21T18:36:00Z 2015-10-21T19:51:46Z MEMBER

If you use the DataArray constructor instead of inserting an item in a Dataset, the array values will always be a view.

If you pre-align the array you are about to insert using xray.align, it is also guaranteed to be a view.

Unfortunately, it's impossible to make such automatically aligned arrays views in general, because of numpy's memory model.

One thing we could do is add an option to make inserted items always a copy. I would probably put this on the Dataset.merge method, which is what Dataset.__getitem__ uses under the hood.

 
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