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  • xarray · 1 ✖
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
2024303763 I_kwDOAMm_X854qGyT 8516 Appending to a ZARR dataset removes dimension separator attribute jbeezley 31890 open 0     1 2023-12-04T16:52:27Z 2023-12-04T17:42:37Z   NONE      

What happened?

When creating a ZARR store with dimension_separator="/", the to_zarr_store method removes dimension_separator attribute in the .zarray file.

What did you expect to happen?

It should retain the original storage attributes.

Minimal Complete Verifiable Example

```Python import json

import xarray as xr from zarr.storage import MemoryStore

store = MemoryStore(dimension_separator="/")

ds = xr.Dataset( {"data": xr.DataArray([0.0], dims=("x",))}, coords={ "x": xr.DataArray([0.0], dims=("x",)), }, ) ds.to_zarr(store, mode="w", consolidated=False) assert json.loads(store["data/.zarray"].decode()).get("dimension_separator") == "/"

ds = xr.Dataset( {"data": xr.DataArray([1.0], dims=("x",))}, coords={ "x": xr.DataArray([1.0], dims=("x",)), }, ) ds.to_zarr( store, append_dim="x", consolidated=False ) assert json.loads(store["data/.zarray"].decode()).get("dimension_separator") == "/" ```

MVCE confirmation

  • [X] Minimal example — the example is as focused as reasonably possible to demonstrate the underlying issue in xarray.
  • [X] Complete example — the example is self-contained, including all data and the text of any traceback.
  • [X] Verifiable example — the example copy & pastes into an IPython prompt or Binder notebook, returning the result.
  • [X] New issue — a search of GitHub Issues suggests this is not a duplicate.
  • [X] Recent environment — the issue occurs with the latest version of xarray and its dependencies.

Relevant log output

```Python AssertionError Traceback (most recent call last) File ~/xarray_repro/run.py:29 18 ds = xr.Dataset( 19 {"data": xr.DataArray([1.0], dims=("x",))}, 20 coords={ 21 "x": xr.DataArray([1.0], dims=("x",)), 22 }, 23 ) 24 ds.to_zarr( 25 store, 26 append_dim="x", 27 consolidated=False 28 ) ---> 29 assert json.loads(store["data/.zarray"].decode()).get("dimension_separator") == "/"

AssertionError: ```

Anything else we need to know?

No response

Environment

INSTALLED VERSIONS ------------------ commit: None python: 3.11.5 (main, Aug 24 2023, 15:18:16) [Clang 14.0.3 (clang-1403.0.22.14.1)] python-bits: 64 OS: Darwin OS-release: 22.5.0 machine: x86_64 processor: i386 byteorder: little LC_ALL: None LANG: en_US.UTF-8 LOCALE: ('en_US', 'UTF-8') libhdf5: None libnetcdf: None xarray: 2023.11.0 pandas: 2.1.3 numpy: 1.26.2 scipy: None netCDF4: None pydap: None h5netcdf: None h5py: None Nio: None zarr: 2.16.1 cftime: None nc_time_axis: None iris: None bottleneck: None dask: 2023.11.0 distributed: None matplotlib: None cartopy: None seaborn: None numbagg: None fsspec: 2023.12.0 cupy: None pint: None sparse: None flox: None numpy_groupies: None setuptools: 68.1.2 pip: 23.2.1 conda: None pytest: None mypy: None IPython: 8.18.1 sphinx: None
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    xarray 13221727 issue

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