nltk.corpus.reader.sentiwordnet

An NLTK interface for SentiWordNet

SentiWordNet is a lexical resource for opinion mining. SentiWordNet assigns to each synset of WordNet three sentiment scores: positivity, negativity, and objectivity.

For details about SentiWordNet see: http://sentiwordnet.isti.cnr.it/

>>> from nltk.corpus import sentiwordnet as swn
>>> print(swn.senti_synset('breakdown.n.03'))
<breakdown.n.03: PosScore=0.0 NegScore=0.25>
>>> list(swn.senti_synsets('slow'))
[SentiSynset('decelerate.v.01'), SentiSynset('slow.v.02'),
SentiSynset('slow.v.03'), SentiSynset('slow.a.01'),
SentiSynset('slow.a.02'), SentiSynset('dense.s.04'),
SentiSynset('slow.a.04'), SentiSynset('boring.s.01'),
SentiSynset('dull.s.08'), SentiSynset('slowly.r.01'),
SentiSynset('behind.r.03')]
>>> happy = swn.senti_synsets('happy', 'a')
>>> happy0 = list(happy)[0]
>>> happy0.pos_score()
0.875
>>> happy0.neg_score()
0.0
>>> happy0.obj_score()
0.125