How to use the textdistance.algorithms.sequence_based.LCSStr function in textdistance

def _find(self, *sequences):
        subseq = LCSStr()(*sequences)
        length = len(subseq)
        if length == 0:
            return 0
        before = [s[:s.find(subseq)] for s in sequences]
        after = [s[s.find(subseq) + length:] for s in sequences]
        return self._find(*before) + length + self._find(*after)

before = [s[:s.find(subseq)] for s in sequences]
        after = [s[s.find(subseq) + length:] for s in sequences]
        return self._find(*before) + length + self._find(*after)

    def __call__(self, *sequences):
        result = self.quick_answer(*sequences)
        if result is not None:
            return result
        scount = len(sequences)  # sequences count
        ecount = sum(map(len, sequences))  # elements count
        sequences = self._get_sequences(*sequences)
        return scount * self._find(*sequences) / ecount


lcsseq = LCSSeq()
lcsstr = LCSStr()
ratcliff_obershelp = RatcliffObershelp()