natural language toolkit stemmers c 20012023 nltk project trevor cohn tacohncs mu oz au edward loper edlopergmail com steven bird stevenbird1gmail com url https www nltk org for license information see license txt nltk stemmers interfaces used to remove morphological affixes from words leaving only the word stem stemming algorithms aim to remove those affixes required for eg grammatical role tense derivational morphology leaving only the stem of the word this is a difficult problem due to irregular words eg common verbs in english complicated morphological rules and partofspeech and sense ambiguities eg ceil is not the stem of ceiling stemmeri defines a standard interface for stemmers natural language toolkit stemmers c 2001 2023 nltk project trevor cohn tacohn cs mu oz au edward loper edloper gmail com steven bird stevenbird1 gmail com url https www nltk org for license information see license txt nltk stemmers interfaces used to remove morphological affixes from words leaving only the word stem stemming algorithms aim to remove those affixes required for eg grammatical role tense derivational morphology leaving only the stem of the word this is a difficult problem due to irregular words eg common verbs in english complicated morphological rules and part of speech and sense ambiguities eg ceil is not the stem of ceiling stemmeri defines a standard interface for stemmers
from nltk.stem.api import StemmerI
from nltk.stem.arlstem import ARLSTem
from nltk.stem.arlstem2 import ARLSTem2
from nltk.stem.cistem import Cistem
from nltk.stem.isri import ISRIStemmer
from nltk.stem.lancaster import LancasterStemmer
from nltk.stem.porter import PorterStemmer
from nltk.stem.regexp import RegexpStemmer
from nltk.stem.rslp import RSLPStemmer
from nltk.stem.snowball import SnowballStemmer
from nltk.stem.wordnet import WordNetLemmatizer