Coverage for nltk.stem : 83%
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# Natural Language Toolkit: Stemmers # # Copyright (C) 2001-2012 NLTK Project # Author: Trevor Cohn <tacohn@cs.mu.oz.au> # Edward Loper <edloper@gradient.cis.upenn.edu> # Steven Bird <sb@csse.unimelb.edu.au> # URL: <http://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. """
import doctest doctest.testmod(optionflags=doctest.NORMALIZE_WHITESPACE) |