def labels(self):
        raise NotImplementedError('Must implement a "labels" method.')
Calculate the conditions that lead to a null denominator
dataset/ETHPy150Open sloria/TextBlob/textblob/classifiers.py/BaseClassifier.labels--crossover with--dataset/ETHPy150Open saullocastro/mapy/mapy/sympytools/denominator.py/null_denominator_conditions