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Recent-ish versions of xarray natively support expanding fsspec URLs
and forwarding storage options. This enables

>>> ds = xr.open_dataset(asset.href, **asset.extra_fields["xarray:open_kwargs"])

rather than the wordier

>>> store = fsspec.get_mapper(asset.href, **asset.extra_fields["xarray:storage_options"])
>>> ds = xr.open_dataset(store, **asset.extra_fields["xarray:open_kwargs])

This PR supports signing the version of assets where storage_options are nested under xarray:open_kwargs or xarray:open_kwargs.backend_kwargs.

Tom Augspurger added 2 commits March 27, 2022 11:56
Recent-ish versions of xarray natively support expanding fsspec URLs
and forwarding storage options. This enables

```python
>>> ds = xr.open_dataset(asset.href, **asset.extra_fields["xarray:open_kwargs"])
```

rather than the wordier

```python
>>> store = fsspec.get_mapper(asset.href, **asset.extra_fields["xarray:storage_options"])
>>> ds = xr.open_dataset(store, **asset.extra_fields["xarray:open_kwargs])
```
@TomAugspurger TomAugspurger merged commit ff8ba6c into main Mar 27, 2022
@TomAugspurger TomAugspurger deleted the feature/sign-open-kwargs branch March 27, 2022 17:04
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