How to use the sacrebleu.CHRF function in sacrebleu

order: int = CHRF_ORDER,
                beta: float = CHRF_BETA,
                remove_whitespace: bool = True) -> CHRF:
    """
    Computes Chrf on a corpus.

    :param hypotheses: Stream of hypotheses.
    :param references: Stream of references
    :param order: Maximum n-gram order.
    :param remove_whitespace: Whether to delete all whitespace from hypothesis and reference strings.
    :param beta: Defines importance of recall w.r.t precision. If beta=1, same importance.
    :return: Chrf score.
    """
    corpus_statistics = get_corpus_statistics(hypotheses, references, order=order, remove_whitespace=remove_whitespace)
    avg_precision, avg_recall = _avg_precision_and_recall(corpus_statistics, order)
    return CHRF(_chrf(avg_precision, avg_recall, beta=beta))

order: int = CHRF_ORDER,
                  beta: float = CHRF_BETA,
                  remove_whitespace: bool = True) -> CHRF:
    """
    Computes ChrF on a single sentence pair.

    :param hypothesis: Hypothesis string.
    :param reference: Reference string.
    :param order: Maximum n-gram order.
    :param remove_whitespace: Whether to delete whitespaces from hypothesis and reference strings.
    :param beta: Defines importance of recall w.r.t precision. If beta=1, same importance.
    :return: Chrf score.
    """
    statistics = get_sentence_statistics(hypothesis, reference, order=order, remove_whitespace=remove_whitespace)
    avg_precision, avg_recall = _avg_precision_and_recall(statistics, order)
    return CHRF(_chrf(avg_precision, avg_recall, beta=beta))