def probabilities(self):
t = sum(itervalues(self.__weights))
return dict((e, float(w) / t) for e, w in iteritems(self.__weights))
def sorted(self):
return sorted(iteritems(self.__weights), key=lambda w: (-w[1], w[0]))
def mergedWith(self, other):
weights = dict(self.__weights)
for element, weight in iteritems(other.__weights):
weights[element] = weights.get(element, 0) + weight
return SoftElement(weights)
def pairs(self):
return iteritems(self.__weights)
def __call__(self, firstElement, secondElement):
score = 0.0
for a, p in iteritems(firstElement.probabilities()):
for b, q in iteritems(secondElement.probabilities()):
score += p * q * self.scoring(a, b)
return score