id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,active_lock_reason,draft,pull_request,body,reactions,performed_via_github_app,state_reason,repo,type
522519084,MDExOlB1bGxSZXF1ZXN0MzQwNzA1Njc2,3526,Allow nested dictionaries in the Zarr backend (#3517),3780274,closed,0,,,7,2019-11-13T22:51:47Z,2023-09-14T03:04:11Z,2023-09-14T03:04:10Z,NONE,,0,pydata/xarray/pulls/3526,"Closes #3517.

I have tried to touch the minimum code as possible while leaving the defaults as they are now. The code works now by redefining to value to save as a list containing the dictionary. However when writing to disk the the dictionary is saved correctly, without the list (I do not understand 100% how it works but it does so someone double check!).

```
$ cat test.zarr/.zattrs
{
    ""foo"": {
        ""bar"": {
            ""val"": 3
        }
    }
}
```
","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/3526/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,pull