How to use the epitran._epitran function in epitran

def __init__(self, lang_script_codes, cedict_file=None):
        """Construct a Backoff object.

        Args:
            lang_script_codes (list): codes for languages to try, starting
            with the highest priority languages
            cedict_file (str): path to the CC-CEdict dictionary file
            (necessary only when cmn-Hans or cmn-Hant are used)
        """
        self.langs = [_epitran.Epitran(c, cedict_file=cedict_file)
                      for c in lang_script_codes]
        self.num_re = re.compile(r'\p{Number}+')
        self.ft = panphon.featuretable.FeatureTable()
        self.xsampa = XSampa()
        self.puncnorm = PuncNorm()
        self.dias = [StripDiacritics(c) for c in lang_script_codes]