code: def vocab_filename(approx_vocab_size, strip):
      return "vocab.wiki_revision%s.%d" % (
          ".strip" if strip else "",
          approx_vocab_size,
      )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import math
  import os
  import random
  import re
  import subprocess
  from tensor2tensor.data_generators import generator_utils
  from tensor2tensor.data_generators import text_encoder
  import tensorflow.compat.v1
label_desc: Use image node_id 20 for calling a global function with example usage: vocab_filename(approx_vocab_size, strip) and returns: unknown