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/4002#issuecomment-619322526,https://api.github.com/repos/pydata/xarray/issues/4002,619322526,MDEyOklzc3VlQ29tbWVudDYxOTMyMjUyNg==,5635139,2020-04-25T05:10:56Z,2020-04-25T05:10:56Z,MEMBER,"OK, I think that's fairly rare, but depending on @shoyer 's preferences, changing those to a check and raise seems reasonable to me","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,606549469 https://github.com/pydata/xarray/issues/4002#issuecomment-619297407,https://api.github.com/repos/pydata/xarray/issues/4002,619297407,MDEyOklzc3VlQ29tbWVudDYxOTI5NzQwNw==,5635139,2020-04-25T01:17:34Z,2020-04-25T01:17:34Z,MEMBER,I might be behind the curve on the pythonic approach there: what's wrong with `assert`s there?,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,606549469 https://github.com/pydata/xarray/issues/4002#issuecomment-619265079,https://api.github.com/repos/pydata/xarray/issues/4002,619265079,MDEyOklzc3VlQ29tbWVudDYxOTI2NTA3OQ==,5635139,2020-04-24T22:28:52Z,2020-04-24T22:28:52Z,MEMBER,We would take a PR to change these to default `None` and then `x=x or {}`,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,606549469