Driver Code
if __name__ == ' _ _ main _ _ ' : NEW_LINE INDENT root1 = None NEW_LINE root2 = None NEW_LINE root1 = node ( 3 ) NEW_LINE root1 . left = node ( 1 ) NEW_LINE root1 . right = node ( 5 ) NEW_LINE root2 = node ( 4 ) NEW_LINE root2 . left = node ( 2 ) NEW_LINE root2 . right = node ( 6 ) NEW_LINE DEDENT