issue_comments

Hmm, I can't reproduce my issue anymore, it now works by default. I have no idea what fixed it. I suppose that means this issue can be closed :)

@jakirkham, your suggestion does not work: ds.to_zarr only seems to accept zarr datastores or a path (in that case the data is stored in a zarr.DirectoryStore) (when I try it, I get the following error:) ```------------------------------------------------------------------------- TypeError Traceback (most recent call last) <ipython-input-13-bd9b742d6a11> in <module> ----> 1 ds.to_zarr(zarr.group(zarr.ZipStore("test.zarr")))

~/.local/lib/python3.7/site-packages/xarray/core/dataset.py in to_zarr(self, store, mode, synchronizer, group, encoding, compute) 1257 from ..backends.api import to_zarr 1258 return to_zarr(self, store=store, mode=mode, synchronizer=synchronizer, -> 1259 group=group, encoding=encoding, compute=compute) 1260 1261 def unicode(self):

~/.local/lib/python3.7/site-packages/xarray/backends/api.py in to_zarr(dataset, store, mode, synchronizer, group, encoding, compute) 879 store = backends.ZarrStore.open_group(store=store, mode=mode, 880 synchronizer=synchronizer, --> 881 group=group) 882 883 writer = ArrayWriter()

~/.local/lib/python3.7/site-packages/xarray/backends/zarr.py in open_group(cls, store, mode, synchronizer, group) 236 "#installation" % min_zarr) 237 zarr_group = zarr.open_group(store=store, mode=mode, --> 238 synchronizer=synchronizer, path=group) 239 return cls(zarr_group) 240

~/.local/lib/python3.7/site-packages/zarr/hierarchy.py in open_group(store, mode, cache_attrs, synchronizer, path) 1134 1135 return Group(store, read_only=read_only, cache_attrs=cache_attrs, -> 1136 synchronizer=synchronizer, path=path)

~/.local/lib/python3.7/site-packages/zarr/hierarchy.py in init(self, store, path, read_only, chunk_store, cache_attrs, synchronizer) 114 err_group_not_found(path) 115 else: --> 116 meta = decode_group_metadata(meta_bytes) 117 self._meta = meta 118

~/.local/lib/python3.7/site-packages/zarr/meta.py in decode_group_metadata(s) 98 def decode_group_metadata(s): 99 s = _ensure_str(s) --> 100 meta = json.loads(s) 101 zarr_format = meta.get('zarr_format', None) 102 if zarr_format != ZARR_FORMAT:

/usr/lib/python3.7/json/init.py in loads(s, encoding, cls, object_hook, parse_float, parse_int, parse_constant, object_pairs_hook, **kw) 339 else: 340 if not isinstance(s, (bytes, bytearray)): --> 341 raise TypeError(f'the JSON object must be str, bytes or bytearray, ' 342 f'not {s.class.name}') 343 s = s.decode(detect_encoding(s), 'surrogatepass')

TypeError: the JSON object must be str, bytes or bytearray, not Array```

I'm not really familiar with XArray's internals, but issue ( https://github.com/pydata/xarray/issues/2660 ) looks relevant.

What happens if you do?

python ds.to_zarr(zarr.group(zarr.ZipStore("test.zarr"))) print(xr.open_zarr(zarr.group(zarr.ZipStore("test.zarr"))))