old_contents: # -*- coding: utf-8 -*-
  
new_contents: # -*- coding: utf-8 -*-
  import sys
  import ast
  
  class TreeNode:
      def __init__(self, x):
          self.val = x
          self.left = None
          self.right = None
  
  def generateTree(list):
      return None
  
  list = ast.literal_eval(sys.argv[1])
  
  if __name__ == '__main__':
      generateTree(list)
  
subject: Read arguments