code: def _get_testdata(filename):
      with tf.io.gfile.GFile(filename) as f:
          return f.read()
  
file_path: tensor2tensor/tensor2tensor/data_generators/wikisum/utils_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  from tensor2tensor.data_generators.wikisum import utils
  import tensorflow.compat.v1
label_desc: Use image node_id 1 for calling a global function with example usage: _get_testdata(filename) and returns: f