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/2931#issuecomment-488050014,https://api.github.com/repos/pydata/xarray/issues/2931,488050014,MDEyOklzc3VlQ29tbWVudDQ4ODA1MDAxNA==,15742456,2019-04-30T17:51:47Z,2019-04-30T17:51:47Z,NONE,"Thanks ... in case I used delattr to delete the name so that I can avoid the error message, then what is the difference between specifing or ignoring the dimnsion that the coordinate is attached. 
`coords={
			'mytime1':(('mytime1'), tt1),
	}`
and 
`
coords={
			'mytime1': tt1,
			}
`
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