code: def translate_and_compute_bleu(estimator, subtokenizer, bleu_source, bleu_ref):
    
    # Create temporary file to store translation.
    tmp = tempfile.NamedTemporaryFile(delete=False)
    tmp_filename = tmp.name
  
    translate.translate_file(
        estimator, subtokenizer, bleu_source, output_file=tmp_filename,
        print_all_translations=False)
  
    # Compute uncased and cased bleu scores.
    uncased_score = compute_bleu.bleu_wrapper(bleu_ref, tmp_filename, False)
    cased_score = compute_bleu.bleu_wrapper(bleu_ref, tmp_filename, True)
    os.remove(tmp_filename)
    return uncased_score, cased_score
docs: Translate file and report the cased and uncased bleu scores.