id,node_id,number,state,locked,title,user,body,created_at,updated_at,closed_at,merged_at,merge_commit_sha,assignee,milestone,draft,head,base,author_association,auto_merge,repo,url,merged_by
377121238,MDExOlB1bGxSZXF1ZXN0Mzc3MTIxMjM4,3780,closed,0,Avoid running test_open_mfdataset_list_attr without dask,490531,"Fixes GH-3777.

 - [x] Closes #3777",2020-02-19T11:41:25Z,2020-02-19T18:24:43Z,2020-02-19T18:24:43Z,2020-02-19T18:24:43Z,90e734a55792f3c19e795df110fc3501c609d191,,,0,7edf728dc6dca340a8a8ff6bf4444a45542e7ca7,52ee5dfe73b51b55cc90f2140f2cd54a2e7946a0,CONTRIBUTOR,,13221727,https://github.com/pydata/xarray/pull/3780,
773024409,PR_kwDOAMm_X84uE2qZ,5936,closed,0,Fix a missing @requires_zarr in tests,490531,"When zarr is not available, this test fails with `NameError: name 'zarr' is not defined`.

<details>
<summary>Full trace</summary>

```
__________________________ test_zarr_storage_options ___________________________

    @requires_fsspec
    def test_zarr_storage_options():
        pytest.importorskip(""aiobotocore"")
        ds = create_test_data()
        store_target = ""memory://test.zarr""
>       ds.to_zarr(store_target, storage_options={""test"": ""zarr_write""})

/build/python-xarray/src/xarray-0.20.0/xarray/tests/test_backends.py:2406: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
/build/python-xarray/src/xarray-0.20.0/xarray/core/dataset.py:2037: in to_zarr
    return to_zarr(
/build/python-xarray/src/xarray-0.20.0/xarray/backends/api.py:1391: in to_zarr
    zstore = backends.ZarrStore.open_group(
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

cls = <class 'xarray.backends.zarr.ZarrStore'>
store = <fsspec.mapping.FSMap object at 0x7f074691cfd0>, mode = 'w-'
synchronizer = None, group = None, consolidated = False
consolidate_on_close = True, chunk_store = None, storage_options = None
append_dim = None, write_region = None, safe_chunks = True, stacklevel = 4

    @classmethod
    def open_group(
        cls,
        store,
        mode=""r"",
        synchronizer=None,
        group=None,
        consolidated=False,
        consolidate_on_close=False,
        chunk_store=None,
        storage_options=None,
        append_dim=None,
        write_region=None,
        safe_chunks=True,
        stacklevel=2,
    ):
    
        # zarr doesn't support pathlib.Path objects yet. zarr-python#601
        if isinstance(store, os.PathLike):
            store = os.fspath(store)
    
        open_kwargs = dict(
            mode=mode,
            synchronizer=synchronizer,
            path=group,
        )
        open_kwargs[""storage_options""] = storage_options
    
        if chunk_store:
            open_kwargs[""chunk_store""] = chunk_store
            if consolidated is None:
                consolidated = False
    
        if consolidated is None:
            try:
                zarr_group = zarr.open_consolidated(store, **open_kwargs)
            except KeyError:
                warnings.warn(
                    ""Failed to open Zarr store with consolidated metadata, ""
                    ""falling back to try reading non-consolidated metadata. ""
                    ""This is typically much slower for opening a dataset. ""
                    ""To silence this warning, consider:\n""
                    ""1. Consolidating metadata in this existing store with ""
                    ""zarr.consolidate_metadata().\n""
                    ""2. Explicitly setting consolidated=False, to avoid trying ""
                    ""to read consolidate metadata, or\n""
                    ""3. Explicitly setting consolidated=True, to raise an ""
                    ""error in this case instead of falling back to try ""
                    ""reading non-consolidated metadata."",
                    RuntimeWarning,
                    stacklevel=stacklevel,
                )
                zarr_group = zarr.open_group(store, **open_kwargs)
        elif consolidated:
            # TODO: an option to pass the metadata_key keyword
            zarr_group = zarr.open_consolidated(store, **open_kwargs)
        else:
>           zarr_group = zarr.open_group(store, **open_kwargs)
E           NameError: name 'zarr' is not defined

/build/python-xarray/src/xarray-0.20.0/xarray/backends/zarr.py:386: NameError
```
</details>",2021-11-04T04:49:39Z,2021-11-04T10:12:58Z,2021-11-04T10:12:46Z,2021-11-04T10:12:46Z,d2edee5df1eaad650c309daa260a7cea58258cce,,,0,0432d70bb5c9b998bda29406c255cb33fe0aeea5,3e05d6ed215a6e71d9bec5d9e25302f7295437c8,CONTRIBUTOR,,13221727,https://github.com/pydata/xarray/pull/5936,