Extract Word From Synset Using Wordnet In Nltk 3.0

Some time ago, someone on SO asked how to retrieve a list of words for a given synset using NLTK's wordnet wrapper. Here is one of the suggested responses: for synset in wn.synsets

Solution 1:

WordNet works fine in NLTK 3.0. You are just accessing the lemmas (and names) in the wrong way. Try this instead:

>>>import nltk>>>nltk.__version__
'3.0.0'
>>>from nltk.corpus import wordnet as wn>>>for synset in wn.synsets('dog'):
    for lemma in synset.lemmas():
        print lemma.name()


dog
domestic_dog
Canis_familiaris
frump
dog
dog
cad
bounder
blackguard
...

synset.lemmas is a method and does not have a __getitem__() method (and so is not subscriptable).

Solution 2:

You can also go directly to the lemma names with lemma_names():

>>> wordnet.synset('dog.n.1').lemma_names()
['dog', 'domestic_dog', 'Canis_familiaris']

And it works for multiple languages

>>>> wordnet.synset('dog.n.1').lemma_names(lang='jpn')
['イヌ', 'ドッグ', '洋犬', '犬', '飼犬', '飼い犬']

Solution 3:

Use:

wn.synset('dog.n.1').name() 

instead of:

wn.synset('dog.n.1').name 

because NLTK changed Synset properties to get functions instead. see https://github.com/nltk/nltk/commit/ba8ab7e23ea2b8d61029484098fd62d5986acd9c

This is a good list of changes to NLTK's API to suit py3.x: https://github.com/nltk/nltk/wiki/Porting-your-code-to-NLTK-3.0