code: def test_get_paths_to_root_without_recursion(self):
      argument_paths = self.world_without_recursion.get_paths_to_root(
          "e -> argument"
      )
      assert argument_paths == [
          ["e -> argument", "t -> [<e,t>, e]", "@start@ -> t"],
          [
              "e -> argument",
              "<e,t> -> [<e,<e,t>>, e]",
              "t -> [<e,t>, e]",
              "@start@ -> t",
          ],
      ]
      unary_function_paths = (
          self.world_without_recursion.get_paths_to_root(
              "<e,t> -> unary_function"
          )
      )
      assert unary_function_paths == [
          ["<e,t> -> unary_function", "t -> [<e,t>, e]", "@start@ -> t"]
      ]
      binary_function_paths = (
          self.world_without_recursion.get_paths_to_root(
              "<e,<e,t>> -> binary_function"
          )
      )
      assert binary_function_paths == [
          [
              "<e,<e,t>> -> binary_function",
              "<e,t> -> [<e,<e,t>>, e]",
              "t -> [<e,t>, e]",
              "@start@ -> t",
          ]
      ]
  
imports: from __future__ import with_statement
  from __future__ import division
  from __future__ import absolute_import
  import json
  from allennlp.common.testing import AllenNlpTestCase
  from allennlp.data.tokenizers import Token
  from allennlp.semparse import ParsingError, World
  from allennlp.semparse.contexts import TableQuestionKnowledgeGraph
  from allennlp.semparse.worlds import NlvrWorld, WikiTablesWorld
  from io import open
label_desc: Use image node_id 2 for calling the TestWorld obj's underlying member method code with example usage: obj.test_get_paths_to_root_without_recursion() without return types