code: def test_height(self):
      self.assertEqual(4, height(self.tree.root))
  
file_path: keon-algos/algorithms/tree/bst/height.py
imports: import unittest
  from bst import Node
  from bst import bst
label_desc: Use image node_id 2 for calling the TestSuite obj's underlying member method code with example usage: obj.test_height() without return types