class_docstr: Dictionary wrapper that updates an arguments instance on any item set in the dictionary 
class_docstr_tok: ["Dictionary","wrapper","that","updates","an","arguments","instance","on","any","item","set","in","the","dictionary"]
code: def __setitem__(self, key, value):
      super(ProxyDictPostWrite, self).__setitem__(key, value)
      self._set_callback()
  
imports: import itertools
  import json
  from copy import copy
  from logging import getLogger
  import six
  import yaml
label_desc: Use image node_id 2 for calling the ProxyDictPostWrite obj's underlying member method code with example usage: obj.__setitem__(key, value) without return types