id,node_id,number,state,locked,title,user,body,created_at,updated_at,closed_at,merged_at,merge_commit_sha,assignee,milestone,draft,head,base,author_association,auto_merge,repo,url,merged_by 66844497,MDExOlB1bGxSZXF1ZXN0NjY4NDQ0OTc=,831,closed,0,"Add a ""reverse groupby"" / ""aggregate over"" method",5629061,"Implements #830 ",2016-04-18T12:27:08Z,2016-05-26T01:55:11Z,2016-05-26T01:55:11Z,,8a4f6f546f0fcf03267dcee39275aeacaa2d46e3,,,0,02e5d52cd16136dd76671326e2eb60ed95a557f9,859ddc2f541a5fd941e72cbf19453e0a21c85a4e,NONE,,13221727,https://github.com/pydata/xarray/pull/831,