code: def __iadd__(self, other):
      for k in self:
          self[k] = self[k] + other[k]
      return self
  
imports: import collections
  import itertools
  import string
  import numpy
  import re
  import copy
  import os
  import json
  import munch
  import pickle
  import csv
  from .viewer.template_editor import TemplateEditor
  from .multilingual import multilingual_params, get_language_code
label_desc: Use image node_id 2 for calling the MunchWithAdd obj's underlying member method code with example usage: obj.__iadd__(other) and returns: self