Clarity on Levenshtein ratio

[Praful932]

Hello @snukky, I wanted some clarity on this piece of code

def __levenshtein_ratio(self, old_sent, new_sent):
    old_words = old_sent.split()
    new_words = new_sent.split()

   min_words = min(len(old_words), len(new_words))
   dist = self.__levenshtein_on_words(old_words, new_words)
   ratio = dist / float(min_words) * math.log(min_words,
   self.LEVENSHTEIN_RATIO_LOG_BASE)

particularly how the ratio is calculated and how it can be interpreted
Is it a scaled version of - how much in ratio will the smaller string need to be operated on given the distance?
Could you point me to relevant literature if available, Thanks