How to use the sacremoses.truecase.MosesTruecaser function in sacremoses

def truecase_file(modelfile, processes, is_asr, encoding, quiet):
    moses = MosesTruecaser(load_from=modelfile, is_asr=is_asr, encoding=encoding)
    moses_truecase = partial(moses.truecase, return_str=True)
    with click.get_text_stream("stdin", encoding=encoding) as fin:
        with click.get_text_stream("stdout", encoding=encoding) as fout:
            fin = fin if quiet else tqdm(fin)
            for line in fin:
                print(moses.truecase(line, return_str=True), end="\n", file=fout)
            # FIXME: parallelize job don't work properly for MosesTruecaser.truecase

def truecase_file(modelfile, processes, is_asr, encoding, quiet):
    moses = MosesTruecaser(load_from=modelfile, is_asr=is_asr, encoding=encoding)
    moses_truecase = partial(moses.truecase, return_str=True)
    with click.get_text_stream("stdin", encoding=encoding) as fin:
        with click.get_text_stream("stdout", encoding=encoding) as fout:
            fin = fin if quiet else tqdm(fin)
            for line in fin:
                print(moses.truecase(line, return_str=True), end="\n", file=fout)
            # FIXME: parallelize job don't work properly for MosesTruecaser.truecase

def train_truecaser(modelfile, processes, is_asr, possibly_use_first_token, encoding, quiet):
    moses = MosesTruecaser(is_asr=is_asr, encoding=encoding)
    with click.get_text_stream("stdin", encoding=encoding) as fin:
        model = moses.train_from_file_object(
            fin,
            possibly_use_first_token=possibly_use_first_token,
            processes=processes,
            progress_bar=(not quiet),
        )
        moses.save_model(modelfile)

def train_truecaser(modelfile, processes, is_asr, possibly_use_first_token, encoding, quiet):
    moses = MosesTruecaser(is_asr=is_asr, encoding=encoding)
    with click.get_text_stream("stdin", encoding=encoding) as fin:
        model = moses.train_from_file_object(
            fin,
            possibly_use_first_token=possibly_use_first_token,
            processes=processes,
            progress_bar=(not quiet),
        )
        moses.save_model(modelfile)

def __init__(self, load_from=None, is_asr=None, encoding="utf8"):
        """
        :param load_from:
        :type load_from:

        :param is_asr: A flag to indicate that model is for ASR. ASR input has
            no case, make sure it is lowercase, and make sure known are cased
            eg. 'i' to be uppercased even if i is known.
        :type is_asr: bool
        """
        # Initialize the object.
        super(MosesTruecaser, self).__init__()
        # Initialize the language specific nonbreaking prefixes.
        self.SKIP_LETTERS_REGEX = re.compile(
            u"[{}{}{}]".format(
                self.Lowercase_Letter, self.Uppercase_Letter, self.Titlecase_Letter
            )
        )

        self.XML_SPLIT_REGX = re.compile("(<.*(?<=>))(.*)((?=]*>)")

        self.SENT_END = {".", ":", "?", "!"}
        self.DELAYED_SENT_START = {
            "(",
            "[",
            '"',
            "'",
            "'",