def append(self, key, value):
        self.dict.setdefault(key, []).append(value)
Return the frequency distribution that this probability
dataset/ETHPy150Open adampresley/bottlepy-bootstrap/app/bottle.py/MultiDict.append--crossover with--dataset/ETHPy150Open nltk/nltk/nltk/probability.py/MLEProbDist.freqdist