def train_stats(self, statistic=None):
        if statistic is None:
            return self._training_stats
        else:
            return self._training_stats.get(statistic)
Set up all tests to use the same url
dataset/ETHPy150Open nltk/nltk/nltk/tag/brill.py/BrillTagger.train_stats--crossover with--dataset/ETHPy150Open Unidata/siphon/siphon/cdmr/tests/test_dataset.py/TestDataset.setup_class