def contains_extractor(document):
    tokens = _get_document_tokens(document)
    features = dict((u'contains({0})'.format(w), True) for w in tokens)
    return features

##### CLASSIFIERS #####
:param required:
dataset/ETHPy150Open sloria/TextBlob/textblob/classifiers.py/contains_extractor--crossover with--dataset/ETHPy150Open saltstack/salt/salt/utils/schema.py/BaseSchemaItem.__init__