def score(self, plaintext):
        "Return a score for text based on how common letters pairs are."
        s = 1.0
        for bi in bigrams(plaintext):
            s = s * self.P2[bi]
        return s
def score(self, plaintext):
        "Return a score for text based on how common letters pairs are."
        s = 1.0
        for bi in bigrams(plaintext):
            s = s * self.P2[bi]
        return s
def score ( self , plaintext ) : s = 1.0 for bi in bigrams ( plaintext ) : s = s * self . P2 [ bi ] return s
Return a score for text based on how common letters pairs are.
Return a score for text based on how common letters pairs are .