issue_comments: 666366366

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https://github.com/pydata/xarray/issues/4290#issuecomment-666366366 https://api.github.com/repos/pydata/xarray/issues/4290 666366366 MDEyOklzc3VlQ29tbWVudDY2NjM2NjM2Ng== 14808389 2020-07-30T13:31:38Z 2020-07-30T13:31:38Z MEMBER

If I remember correctly, Dataset inherits from dict and doesn't define it's own __bool__, so it has the behavior of dict.__bool__: ```python In [2]: bool(xr.Dataset()) Out[2]: False

In [3]: bool(xr.Dataset({"x": False})) Out[3]: True

In [4]: bool({}) Out[4]: False

In [5]: bool({"x": False}) Out[5]: True ```

 
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