nltk.stem.snowball._ScandinavianStemmer

class documentation

class _ScandinavianStemmer(_LanguageSpecificStemmer): (source)

Known subclasses: nltk.stem.snowball.DanishStemmer, nltk.stem.snowball.NorwegianStemmer, nltk.stem.snowball.SwedishStemmer

Constructor: _ScandinavianStemmer(ignore_stopwords)

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This subclass encapsulates a method for defining the string region R1. It is used by the Danish, Norwegian, and Swedish stemmer.

Method _r1_scandinavian Return the region R1 that is used by the Scandinavian stemmers.

Inherited from _LanguageSpecificStemmer:

Method	`__init__`	Undocumented
Method	`__repr__`	Print out the string representation of the respective class.
Instance Variable	`stopwords`	Undocumented

Inherited from StemmerI (via _LanguageSpecificStemmer):

Method stem Strip affixes from the token and return the stem.

def _r1_scandinavian(self, word, vowels): (source) ¶

Return the region R1 that is used by the Scandinavian stemmers.

R1 is the region after the first non-vowel following a vowel, or is the null region at the end of the word if there is no such non-vowel. But then R1 is adjusted so that the region before it contains at least three letters.

Parameters
word:str or unicode	The word whose region R1 is determined.
vowels:unicode	The vowels of the respective language that are used to determine the region R1.
Returns
unicode	the region R1 for the respective word.
Note
This helper method is invoked by the respective stem method of the subclasses DanishStemmer, NorwegianStemmer, and SwedishStemmer. It is not to be invoked directly!