code: def replace_mask(text):
      """Replaces multiple instances of mask with indexed versions.
  
      Parameters
      ----------
      text : string
          masked input, e.g. "This is a {mask} {mask} and {mask}"
  
      Returns
      -------
      string
          multiple instances of the same mask are replaced with indexed versions
          e.g. "This is a {mask[0]} {mask[1]} and {mask[2]}
  
      """
      mask_finder = re.compile(r"\{((?:[^\}]*:)?mask\d*)\}")
      i = 0
      while mask_finder.search(text):
          text = mask_finder.sub(r"{\1[%d]}" % i, text, 1)
          i += 1
      return text
  
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 3 for calling a global function with example usage: replace_mask(text) and returns: text