class_docstr: Packed version for TPU training.
class_docstr_tok: ["Packed","version","for","TPU","training","."]
code: def vocab_filename(self):
      return LanguagemodelLm1b32k().vocab_filename
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import tarfile
  from six.moves import range
  from tensor2tensor.data_generators import generator_utils
  from tensor2tensor.data_generators import problem
  from tensor2tensor.data_generators import text_encoder
  from tensor2tensor.data_generators import text_problems
  from tensor2tensor.utils import registry
  import tensorflow.compat.v1
label_desc: Use image node_id 2 for calling the LanguagemodelLm1b32kPacked obj's underlying member method code with example usage: obj.vocab_filename() and returns: LanguagemodelLm1b32k