Can WordNetLemmatizer in Nltk stem words?

问题

I want to find word stems with Wordnet. Does wordnet have a function for stemming? I use this import for my stemming, but it doesn't work as expected.

from nltk.stem.wordnet import WordNetLemmatizer
WordNetLemmatizer().lemmatize('Having','v')

回答1:

Try using one of the stemmers in nltk.stem module, such as the PorterStemmer. Here's an online demo of NLTK's stemmers: http://text-processing.com/demo/stem/

回答2:

Seems like you have to input a lowercase string to the lemmatize method:

>>> WordNetLemmatizer().lemmatize('having','v')
'have'
>>> WordNetLemmatizer().lemmatize('has','v')
'have'

回答3:

No, Wordnet cannot stem the words. It can only give lemmatized words i.e. words which are actual words in the language. A stemmer may not always give real meaningful words.

来源：https://stackoverflow.com/questions/6658380/can-wordnetlemmatizer-in-nltk-stem-words