code: def dict_union(*dicts):
      ret = {}
      for d in dicts:
          ret.update(d)
      return ret
  
imports: from __future__ import print_function
  from collections import OrderedDict
  from os.path import abspath, join, dirname, exists
  from utils.common import check_update
  from utils.type_conv import type_from_proto
  import time
  import yaml
label_desc: Use image node_id 5 for calling a global function with example usage: dict_union() and returns: ret