Add .to_icechunk() method to ManifestGroup#591
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TomNicholas wants to merge 3 commits intozarr-developers:mainfrom
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Add .to_icechunk() method to ManifestGroup#591TomNicholas wants to merge 3 commits intozarr-developers:mainfrom
.to_icechunk() method to ManifestGroup#591TomNicholas wants to merge 3 commits intozarr-developers:mainfrom
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TomNicholas
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TomNicholas
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May 11, 2025
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| return cls(arrays=manifestarrays, attributes=attributes) | ||
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| def to_icechunk( |
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The point of adding this on ManifestGroup instead of ManifestStore initially is to make it easier to compose to deal with virtual datatrees later.
maxrjones
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Sep 5, 2025
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| @classmethod | ||
| def from_virtual_dataset( | ||
| cls, | ||
| vds: xr.Dataset, | ||
| ) -> "ManifestGroup": | ||
| """ | ||
| Create a new ManifestGroup from a virtual dataset object. | ||
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| The virtual dataset should contain only virtual variables, i.e. those backed by ManifestArrays. | ||
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| Parameters | ||
| ---------- | ||
| vds: xr.Dataset | ||
| Virtual dataset, containing only virtual variables. | ||
| """ | ||
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| for name, var in vds.variables.items(): | ||
| if not isinstance(var.data, ManifestArray): | ||
| raise TypeError( | ||
| f"Cannot convert a dataset containing a loadable variable directly to a ManifestGroup, but found variable {name} has type {type(var.data)}" | ||
| ) | ||
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| manifestarrays = {name: var.data for name, var in vds.variables.items()} | ||
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| attributes = vds.attrs | ||
| # TODO test this is correct | ||
| attributes["dimension_names"] = " ".join(list(vds.dims)) | ||
| # TODO test this constructor round-trips coordinates | ||
| attributes["coordinates"] = " ".join(list(vds.coords)) | ||
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| return cls(arrays=manifestarrays, attributes=attributes) |
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Could this functionality be moved to a different PR to constrain the scope of the ManifestGroup.to_icechunk feature?
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This (WIP) PR adds a
to_icechunk()method directly onManifestGroup, and refactors the.to_icechunk()virtual dataset accessor method to go via the newManifestGroupmethod.The point is
ManifestStoreto virtual dataset, by adding the ability to go back from a virtual dataset to a ManifestStore,After this PR we should do the same for
.to_kerchunk()- at that point we could actually make xarray an optional dependency if we want to.docs/releases.rstapi.rst