nltk.WordNetLemmatizer¶

class nltk.WordNetLemmatizer[source]¶

WordNet Lemmatizer

Lemmatize using WordNet’s built-in morphy function. Returns the input word unchanged if it cannot be found in WordNet.

>>> from nltk.stem import WordNetLemmatizer
>>> wnl = WordNetLemmatizer()
>>> print(wnl.lemmatize('dogs'))
dog
>>> print(wnl.lemmatize('churches'))
church
>>> print(wnl.lemmatize('aardwolves'))
aardwolf
>>> print(wnl.lemmatize('abaci'))
abacus
>>> print(wnl.lemmatize('hardrock'))
hardrock