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Preserve the radix tree root when deleting a branch #15486

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dhairyajangir wants to merge 1 commit into from
+2 −2
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Preserve the radix tree root when deleting a branch #15486

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4 changes: 2 additions & 2 deletions data_structures/trie/radix_tree.py
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Original file line number Diff line number Diff line change
Expand Up @@ -167,8 +167,8 @@ def delete(self, word: str) -> bool:
# We delete the nodes if no edges go from it
if len(incoming_node.nodes) == 0:
del self.nodes[word[0]]
# We merge the current node with its only child
if len(self.nodes) == 1 and not self.is_leaf:
# Merge non-root nodes with their only child.
if self.prefix and len(self.nodes) == 1 and not self.is_leaf:
merging_node = next(iter(self.nodes.values()))
self.is_leaf = merging_node.is_leaf
self.prefix += merging_node.prefix
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