def METHOD_NAME(text_file_name):
  binary_file_name = text_file_name.replace('.txt', '.bin')
  if not os.path.exists(binary_file_name):
    t0 = time.time()
    subprocess.check_call([sys.executable,
                           'src/python/buildBinaryLineDocs.py',
                           text_file_name,
                           binary_file_name])
    t1 = time.time()
    print('%.1f sec to create binary line file %s' % (t1 - t0, binary_file_name))
  print('binary line file is %.2f GB' % to_gb(os.path.getsize(binary_file_name)))