Package nltk :: Package stem :: Module lancaster :: Class LancasterStemmer

type LancasterStemmer

  object --+    
           |    
api.StemmerI --+
               |
              LancasterStemmer

Instance Methods

__init__(self)
Create an instance of the Lancaster stemmer.

source code

parseRules(self, rule_tuple)
Validate the set of rules used in this stemmer.

source code

stem(self, word)
Stem a word using the Lancaster stemmer.

source code

__doStemming(self, word, intact_word)
Perform the actual word stemming

source code

__getLastLetter(self, word)
Get the zero-based index of the last alphabetic character in this string

source code

__isAcceptable(self, word, remove_total)
Determine if the word is acceptable for stemming.

source code

__applyRule(self, word, remove_total, append_string)
Apply the stemming rule to the word

source code

source code

Class Variables

rule_tuple = ('ai*2.', 'a*1.', 'bb1.', 'city3s.', 'ci2>', 'cn1...

Method Details

Create an instance of the Lancaster stemmer.

Stem a word using the Lancaster stemmer.

Parameters:

Class Variable Details

Value:

('ai*2.',
 'a*1.',
 'bb1.',
 'city3s.',
 'ci2>',
 'cn1t>',
 'dd1.',
 'dei3y>',
...