Class sentiment

pattern/text/en/wordnet/__init__.py:431–441

# Older code may be using pattern.en.wordnet.sentiment[w],
# which yields a (positive, negative, neutral)-tuple.
class sentiment(object):

    def load(self, **kwargs):
        sentiwordnet.load(**kwargs)

    def __getitem__(self, w):
        p, s = sentiwordnet.get(w, (0.0, 0.0))
        return p < 0 and (0.0, -p, 1.0-s) or (p, 0.0, 1.0-s)

    def __contains__(self, w):
        return w in sentiwordnet

sentiment = sentiment()