Support glob patterns in open_datatree(group=...) for selective group loading#11302
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aladinor wants to merge 8 commits intopydata:mainfrom
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Support glob patterns in open_datatree(group=...) for selective group loading#11302aladinor wants to merge 8 commits intopydata:mainfrom
aladinor wants to merge 8 commits intopydata:mainfrom
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Add _is_glob_pattern, _filter_group_paths, and _resolve_group_and_filter to common.py for detecting and applying glob patterns to group paths.
Use _resolve_group_and_filter in open_groups_as_dict to support glob patterns in the group parameter for selective group loading.
Use _resolve_group_and_filter in open_groups_as_dict to support glob patterns in the group parameter for selective group loading.
Use _resolve_group_and_filter in open_groups_as_dict to support glob patterns in the group parameter for selective group loading.
Update docstrings for the group kwarg in open_datatree and open_groups to describe glob metacharacter behavior.
Add integration tests for netCDF4, h5netcdf, and zarr backends, plus unit tests for _is_glob_pattern, _filter_group_paths, and _resolve_group_and_filter covering *, ?, and [] metacharacters.
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Summary
When the
groupparameter contains glob metacharacters (*,?,[), filter which groups are opened instead of re-rooting the tree. This avoids loading the entire hierarchy when only a subset is needed.Use cases
xr.open_datatree("radar.nc", group="*/sweep_0")— load only the lowest elevation sweep from each volume scanxr.open_datatree("cmip.zarr", group="*/historical/tas")— load only temperature across all modelsChanges
_is_glob_pattern,_filter_group_paths, and_resolve_group_and_filterincommon.pyDataTree.match()(PurePosixPath.match)/) and all ancestors of matched nodes are always included to form a valid treeBehavior summary
groupvalueNone"VCP-34"(no glob chars)"*/sweep_0"(glob chars)open_datatree(group=...)for selective group loading #11196whats-new.rstapi.rstTest plan
_is_glob_pattern,_filter_group_paths,_resolve_group_and_filterwith*,?,[]open_groupsAPItest_backends_datatree.pysuite passes (228 passed, 0 failures)