comefrom: <doocs>0655.Print Binary Tree_1.py
code: def height(root):
      if root is None:
          return -1
      return 1 + max(height(root.left), height(root.right))
masked: def sample_funcname ( var_1 ) :
      if var_1 is None :
          return - 1
      return 1 + max ( var_0 ( var_1.left ) , var_0 ( var_1.right ) )
  