How to get all the meanings of a word using python NLTK?

Question

I want to use all meanings of a particular word in an input query.

For example:

Suppose my input query is: \"Dog is barking at tree\"

Answer 1

To know which word have the same/similar pos tag, you can use the idiomatic

>>> from nltk.tag import pos_tag
>>> sent = "dog is barking at tree"
>>> [i for i in pos_tag(sent.split()) if i[1] == "NN"]
[('dog', 'NN'), ('tree', 'NN')]

Then to get the possible synsets for a word, simply do:

>>> from nltk.corpus import wordnet as wn
>>> wn.synsets('dog')
[Synset('dog.n.01'), Synset('frump.n.01'), Synset('dog.n.03'), Synset('cad.n.01'), Synset('frank.n.02'), Synset('pawl.n.01'), Synset('andiron.n.01'), Synset('chase.v.01')]

Most probably the solution you're looking for is:

>>> from nltk.corpus import wordnet as wn
>>> from nltk.tag import pos_tag
>>> sent = "dog is barking at tree"
>>> for i in [i[0] for i in pos_tag(sent.split()) if i[1].lower()[0] == 'n']:
...     print wn.synsets(i); print
... 
[Synset('dog.n.01'), Synset('frump.n.01'), Synset('dog.n.03'), Synset('cad.n.01'), Synset('frank.n.02'), Synset('pawl.n.01'), Synset('andiron.n.01'), Synset('chase.v.01')]

[Synset('tree.n.01'), Synset('tree.n.02'), Synset('tree.n.03'), Synset('corner.v.02'), Synset('tree.v.02'), Synset('tree.v.03'), Synset('tree.v.04')]