Can WordNetLemmatizer in Nltk stem words?

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.wordne开发者_运维知识库t import WordNetLemmatizer
WordNetLemmatizer().lemmatize('Having','v')

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

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

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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/

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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.