code: def test_same_count(self):
      tree = links.BinaryHierarchicalSoftmax.create_huffman_tree(
          {"x": 1, "y": 2, "z": 3}
      )
      # Order of the same items are not defined.
      self.assertTrue(
          (("x", "y"), "z") == tree or ("z", ("x", "y")) == tree
      )
  
imports: import copy
  import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import gradient_check
  from chainer import links
  from chainer import testing
  from chainer.testing import attr
  from chainer.testing import condition
label_desc: Use image node_id 3 for calling the TestHuffmanTree obj's underlying member method code with example usage: obj.test_same_count() without return types