feat(sdk): node navigation helpers get_node, get_node_parent, get_node_path, get_node_map - #542
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…e_path, get_node_map They take the tree, not a doc_id: fetch it once (get_document_structure) and navigate locally, instead of one request per step. get_node / get_node_parent / get_node_path share one depth-first walk, O(n) per call; trees run tens to a few hundred nodes. They return the tree's own nodes rather than copies (unlike get_nodes / get_leaf_nodes), so node["nodes"] keeps working. get_node_map is create_node_mapping under a name in the same family. It leaves out include_page_ranges, which reads page_index and raises KeyError on local trees. create_node_mapping stays as the 0.2.8 surface.
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…ranges
get_node, get_node_parent, get_node_path and get_node_map returned
None / [] / {} when handed the whole get_tree() response or a None tree,
and get_node matched nothing for an int id. Callers (AI-written ones
especially) read that as "node absent". They now raise TypeError naming
get_document_structure(doc_id) / get_tree(doc_id)['result'].
create_node_mapping(include_page_ranges=True) read node["page_index"],
so a raw tree from page_index_main (start_index/end_index) raised
KeyError although it already carries its ranges. A node's own
start_index/end_index now win; page_index trees map as before.
#541 makes the same change (a node's own start_index/end_index win) with its own test, and the two versions conflict on merge. The node helpers here don't depend on it.
create_node_mapping walked children with tree.get('nodes', []), so a
node carrying nodes: None raised TypeError while get_node and
get_node_path, which use `or []`, handled the same tree. Use `or []`
in the shared walker so every create_node_mapping caller is covered.
#541 does not touch this line; a trial merge with its head 79d88e8 is
clean.
This was referenced Oct 1, 2026
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Adds four functions for navigating a document tree, in
pageindex.utils(also reachable aspageindex.get_nodeetc.):doc_id: fetch it once and navigate locally, instead of one request per step.get_nodes/get_leaf_nodes), sonode["nodes"]keeps working.TypeErrornaming the right one, so it never reads as "not found": the wholeget_tree()response (pass its['result']), aNonetree, or a non-string id.get_node_mapiscreate_node_mapping, plus that input check, under a name in the same family.create_node_mappingstays as the 0.2.8 surface.create_node_mapping(soget_node_maptoo) walks past a node whosenodesisNoneinstead of raisingTypeError, asget_nodealready did.Tests:
test_node_navigationandtest_node_navigation_rejects_wrong_inputintests/test_package_surface.py.