issue_comments: 532679376

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https://github.com/pydata/xarray/issues/3317#issuecomment-532679376 https://api.github.com/repos/pydata/xarray/issues/3317 532679376 MDEyOklzc3VlQ29tbWVudDUzMjY3OTM3Ng== 6213168 2019-09-18T13:16:49Z 2019-09-18T13:16:49Z MEMBER

@mraspaud temporary workaround: ```python class DataArrayWithWeakRef(xarray.DataArray): slots = ("weakref", )

a = DataArrayWithWeakRef([1, 2, 3]) ref(a)

<weakref at 0x11e3b1e58; to 'DataArrayWithWeakRef' at 0x11ef3cd68> ```

 
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