Function _deduplicate_inherited_coordinates

xarray/core/datatree.py:196–215

(child: DataTree, parent: DataTree)

def _deduplicate_inherited_coordinates(child: DataTree, parent: DataTree) -> None:
    # This method removes repeated indexes (and corresponding coordinates)
    # that are repeated between a DataTree and its parents.
    removed_something = False
    for name in parent._indexes:
        if name in child._node_indexes:
            # Indexes on a Dataset always have a corresponding coordinate.
            # We already verified that these coordinates match in the
            # check_alignment() call from _pre_attach().
            del child._node_indexes[name]
            del child._node_coord_variables[name]
            removed_something = True

    if removed_something:
        child._node_dims = calculate_dimensions(
            child._data_variables | child._node_coord_variables
        )

    for grandchild in child._children.values():
        _deduplicate_inherited_coordinates(grandchild, child)


def _check_for_slashes_in_names(variables: Iterable[Hashable]) -> None: