code: def corpus_page_generator(corpus_files, tmp_dir, max_page_size_exp):
    
    for remote_filepath in corpus_files:
  
      filepath = maybe_copy_file_to_directory(remote_filepath, tmp_dir)
      tf.logging.info("Reading from " + filepath)
  
      command = ["7z", "x", "-so", filepath]
      tf.logging.info("Running command: %s", command)
  
      p = subprocess.Popen(command, stdout=subprocess.PIPE, bufsize=-1)
  
      for page in file_page_generator(p.stdout, 2**max_page_size_exp):
        yield page
docs: Generate pages from a list of .7z encoded history dumps.
  
    Args:
      corpus_files: a list of strings
      tmp_dir: a string
      max_page_size_exp: an integer
  
    Yields:
      strings