{"id":"node-children-default-empty-list","text":"`Node.__init__` in n-ary tree solutions avoids Python's mutable default argument pitfall by using `None` as the default parameter and replacing with `[]` inside the constructor body.","truth_value":"IN","source":"entries/2026/06/06/n-ary-tree-postorder-traversal-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"node-children-default-empty-list","truth_value":"IN","reason":"premise"}]}}