code: def __setitem__(self, key, item):
      if key not in self.all_keys:
          raise KeyError(
              "Key {} not in predefined set of keys".format(key)
          )
      setattr(self, key, item)
  
imports: import copy
  import json
  import pickle
  from typing import *
  import paddle
label_desc: Use image node_id 15 for calling the InputFeatures obj's underlying member method code with example usage: obj.__setitem__(key, item) without return types