def train(self, labeled_featureset):
        raise NotImplementedError('Must implement a "train" method.')
L{reporter._ExitWrapper} does not cause a wrapped reporter to stop
dataset/ETHPy150Open sloria/TextBlob/textblob/classifiers.py/BaseClassifier.train--crossover with--dataset/ETHPy150Open twisted/twisted/twisted/trial/test/test_reporter.py/ExitWrapperTests.test_doesNotStopOnUnexpectedSuccess