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/3815#issuecomment-603977609,https://api.github.com/repos/pydata/xarray/issues/3815,603977609,MDEyOklzc3VlQ29tbWVudDYwMzk3NzYwOQ==,5635139,2020-03-25T17:28:35Z,2020-03-25T17:28:35Z,MEMBER,"Thanks for the alternative repro. And I'm fairly confident this is a zarr issue; if the format can't handle a zero-dimensioned coord, it should raise a specific error rather than it being a bad ZipFile","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,573577844
https://github.com/pydata/xarray/issues/3815#issuecomment-603974527,https://api.github.com/repos/pydata/xarray/issues/3815,603974527,MDEyOklzc3VlQ29tbWVudDYwMzk3NDUyNw==,5635139,2020-03-25T17:22:57Z,2020-03-25T17:22:57Z,MEMBER,"> I've avoided attrs since they often get ""lost"" in computation, and don't get dragged along as rigorously as coordinates.

Yeah, we're gradually fixing this. You can set a config to keep attrs by default, or pass `keep_attrs=True` in most methods. We might still be missing a couple of methods; would appreciate a bug report for any of those.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,573577844
https://github.com/pydata/xarray/issues/3815#issuecomment-603650213,https://api.github.com/repos/pydata/xarray/issues/3815,603650213,MDEyOklzc3VlQ29tbWVudDYwMzY1MDIxMw==,5635139,2020-03-25T05:36:00Z,2020-03-25T05:36:00Z,MEMBER,"I had a quick debug but didn't completely resolve it. It works fine if you add it as an attribute; do you mean to be adding a single string as a data variable?

```python


In [8]: import xarray as xr
   ...: import zarr
   ...: x = xr.Dataset()
   ...: x.attrs['hello'] = 'world'  # changed
   ...: x
   ...: with zarr.ZipStore('test_store.zip', mode='w') as store:
   ...:     x.to_zarr(store)
   ...: with zarr.ZipStore('test_store.zip', mode='r') as store:
   ...:     x_read = xr.open_zarr(store).compute()
   ...:
```

Debugging is non-trivial because the ZipFile is closed by the time I could run `%debug`. It's not impossible but would take more than a quick look in a repl. That said, I do think this looks likely to be a zarr issue given it depends on the storage format that zarr is using. It's possible xarray is calling it incorrectly but I'd think it's less likely.
","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,573577844
https://github.com/pydata/xarray/issues/3815#issuecomment-603646754,https://api.github.com/repos/pydata/xarray/issues/3815,603646754,MDEyOklzc3VlQ29tbWVudDYwMzY0Njc1NA==,5635139,2020-03-25T05:21:53Z,2020-03-25T05:21:53Z,MEMBER,"@hmaarrfk my apologies, I misread your issue and it was always reproducible. I had thought it was referencing a file `test_store.zip` when actually it was writing it, mea culpa.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,573577844
https://github.com/pydata/xarray/issues/3815#issuecomment-603569789,https://api.github.com/repos/pydata/xarray/issues/3815,603569789,MDEyOklzc3VlQ29tbWVudDYwMzU2OTc4OQ==,5635139,2020-03-25T00:13:16Z,2020-03-25T00:13:16Z,MEMBER,"You did supply the traceback! But it's not reproducible. And consistent with https://github.com/pydata/xarray/issues/3831#issuecomment-595403356, it's difficult to attribute the break on examples like these.

You could try debugging into the `return array[key.tuple]` call, which is the last one in xarray, and identifying whether xarray is making a bad call or zarr is incorrectly failing?","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,573577844
https://github.com/pydata/xarray/issues/3815#issuecomment-603295542,https://api.github.com/repos/pydata/xarray/issues/3815,603295542,MDEyOklzc3VlQ29tbWVudDYwMzI5NTU0Mg==,5635139,2020-03-24T15:10:21Z,2020-03-24T15:10:21Z,MEMBER,Do you have a reproducible example? Otherwise I'm not sure how to help resolve...,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,573577844
https://github.com/pydata/xarray/issues/3815#issuecomment-602271821,https://api.github.com/repos/pydata/xarray/issues/3815,602271821,MDEyOklzc3VlQ29tbWVudDYwMjI3MTgyMQ==,5635139,2020-03-22T20:57:02Z,2020-03-22T20:57:02Z,MEMBER,"Hi @hmaarrfk , I don't know this area of code well but attempting to ensure that we resolve the question. 

Should this be an xarray or a zarr issue? Is there something you think xarray is doing incorrectly here?","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,573577844