issue_comments: 573550514

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https://github.com/pydata/xarray/issues/3668#issuecomment-573550514 https://api.github.com/repos/pydata/xarray/issues/3668 573550514 MDEyOklzc3VlQ29tbWVudDU3MzU1MDUxNA== 3922329 2020-01-13T08:13:10Z 2020-01-13T09:01:02Z NONE

@jhamman I did already confirm it with a zarr-only test, pickling and unpickling a zarr group object. I get the same error as with an xarray dataset: ValueError: group not found at path ''

Not sure if we can call it a bug though. According to the storage specification https://zarr.readthedocs.io/en/stable/spec/v2.html#storage for a group to exist a .zgroup key must exist under the corresponding logical path, so in the case of DirectoryStore it's natural to check if a .zgroup file exists at group object creation time.

 
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