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/2109#issuecomment-387771898,https://api.github.com/repos/pydata/xarray/issues/2109,387771898,MDEyOklzc3VlQ29tbWVudDM4Nzc3MTg5OA==,1217238,2018-05-09T15:08:38Z,2018-05-09T15:08:38Z,MEMBER,"You need to explicitly indicate that you want lazy loading with dask by specifying the `chunks` keyword argument to `open_dataset()`, or by calling `.chunk()` afterwards. If you do that, then yes operations like `expand_dims()` will be lazy.

Otherwise, files are opened with xarray's built-in lazy loading capabilities, which only supports lazy indexing (`expand_dims()` could potentially be supported, too, with some effort, but you are really best off switching to dask).","{""total_count"": 1, ""+1"": 1, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,321553778