issue_comments: 361562466

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https://github.com/pydata/xarray/pull/1837#issuecomment-361562466 https://api.github.com/repos/pydata/xarray/issues/1837 361562466 MDEyOklzc3VlQ29tbWVudDM2MTU2MjQ2Ng== 6815844 2018-01-30T11:16:34Z 2018-01-30T11:16:34Z MEMBER

Hmm... The support of nansum for object-dtype is much more difficult than I expected.

Now, I am stacked in supporting numpy<1.13. With numpy<1.13, nansum for the object type gives just a nan.

nansum scripts defined in numpy==1.13 does not help because != operator used here behaves differently in numpy<1.13.

I think our best choice is to revert this PR to 4189d71 and left this issue to #1866.

 
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