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1953001043 I_kwDOAMm_X850aG5T 8343 Add `metadata_only` param to `.to_zarr`? max-sixty 5635139 open 0     17 2023-10-19T20:25:11Z 2023-11-15T05:22:12Z   MEMBER      

Is your feature request related to a problem?

A leaf from https://github.com/pydata/xarray/issues/8245, which has a bullet:

compute=False is arguably a less-than-obvious kwarg meaning "write metadata". Maybe this should be a method, maybe it's a candidate for renaming? Or maybe make_template can be an abstraction over it

I've also noticed that for large arrays, running compute=False can take several minutes, despite the indexes being very small. I think this is because it's building a dask task graph — which is then discarded, since the array is written from different machines with the region pattern.

Describe the solution you'd like

Would introducing a metadata_only parameter to to_zarr help here: - Better name - No dask graph

Describe alternatives you've considered

No response

Additional context

No response

 
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     xarray 13221727 issue
728888328 MDExOlB1bGxSZXF1ZXN0NTA5NTAyMjA2 4534 Add isocalendar to dt fields max-sixty 5635139 closed 0     17 2020-10-24T22:13:29Z 2020-11-19T23:36:20Z 2020-11-19T08:04:16Z MEMBER   0 pydata/xarray/pulls/4534
  • [x] Tests added
  • [x] Passes isort . && black . && mypy . && flake8
  • [ ] User visible changes (including notable bug fixes) are documented in whats-new.rst
  • [x] New functions/methods are listed in api.rst

This currently fails tests — IIUC because our infra for this expects scalars rather than tuples, and isocalendar returns a tuple.

The existing week & weekofyear are going to stop working at some point, so if we can move off those that would be ideal:

``` xarray/tests/test_accessor_dt.py::TestDatetimeAccessor::test_field_access[weekofyear] xarray/tests/test_accessor_dt.py::TestDatetimeAccessor::test_field_access[week] /Users/maximilian/workspace/xarray/xarray/tests/test_accessor_dt.py:72: FutureWarning: weekofyear and week have been deprecated, please use DatetimeIndex.isocalendar().week instead, which returns a Series. To exactly reproduce the behavior of week and weekofyear and return an Index, you may call pd.Int64Index(idx.isocalendar().week) getattr(self.times, field), name=field, coords=[self.times], dims=["time"]

xarray/tests/test_accessor_dt.py::TestDatetimeAccessor::test_field_access[weekofyear] xarray/tests/test_accessor_dt.py::TestDatetimeAccessor::test_field_access[week] /Users/maximilian/workspace/xarray/xarray/core/accessor_dt.py:44: FutureWarning: Series.dt.weekofyear and Series.dt.week have been deprecated. Please use Series.dt.isocalendar().week instead. field_values = getattr(values_as_series.dt, name).values

-- Docs: https://docs.pytest.org/en/stable/warnings.html ```

I'd be very happy for someone else to take this on...

 
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     xarray 13221727 pull

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