code: def __set__(self, obj, val):
      raise AttributeError(
          "The value of a constant cannot be modified!"
      )
  
imports: from itertools import cycle
  from collections import OrderedDict
  from collections.abc import MutableMapping
  import paddle
label_desc: Use image node_id 3 for calling the _Constant obj's underlying member method code with example usage: obj.__set__(obj, val) without return types