html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/issues/656#issuecomment-156581823,https://api.github.com/repos/pydata/xarray/issues/656,156581823,MDEyOklzc3VlQ29tbWVudDE1NjU4MTgyMw==,109530,2015-11-13T22:54:21Z,2015-11-13T22:54:21Z,NONE,"For the sake of cut & paste:

``` python
ds = xray.Dataset( {'my_ones': (('dim1',), np.ones((100)))}, {'dim1':np.arange(0,100)})
ds
ds['new_var'] = np.random.rand(100) / ds.my_ones
ds
ds.my_ones = np.random.rand(100)
ds
ds.attrs['my_ones'] = ds.my_ones
ds
```

below will initially fail because ds.my_ones is just an array and has no attribute `values`:

``` python
ds.my_ones.values = ds.my_ones
del ds.my_ones
ds
ds.my_ones.values = ds.attrs['my_ones']
```
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