def __getitem__(self, item):
        if self._cache is None:
            self._fill_cache()

        return self._cache[item]
Computes, optionally caches, and returns the value of the
dataset/ETHPy150Open aalto-speech/morfessor/morfessor/evaluation.py/MorfessorEvaluationResult.__getitem__--crossover with--dataset/ETHPy150Open mahmoud/boltons/boltons/formatutils.py/DeferredValue.get_value