nltk.stem.snowball.PorterStemmer

class documentation

A word stemmer based on the original Porter stemming algorithm.

Porter, M. "An algorithm for suffix stripping." Program 14.3 (1980): 130-137.

A few minor modifications have been made to Porter's basic algorithm. See the source code of the module nltk.stem.porter for more information.

Method __init__ Undocumented

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

Method	`stem`	:param to_lowercase: if `to_lowercase=True` the word always lowercase
Constant	`MARTIN_EXTENSIONS`	Undocumented
Constant	`NLTK_EXTENSIONS`	Undocumented
Constant	`ORIGINAL_ALGORITHM`	Undocumented
Instance Variable	`mode`	Undocumented
Instance Variable	`pool`	Undocumented
Instance Variable	`vowels`	Undocumented
Method	`_apply_rule_list`	Applies the first applicable suffix-removal rule to the word
Method	`_contains_vowel`	Returns True if stem contains a vowel, else False
Method	`_ends_cvc`	Implements condition *o from the paper
Method	`_ends_double_consonant`	Implements condition *d from the paper
Method	`_has_positive_measure`	Undocumented
Method	`_is_consonant`	Returns True if word[i] is a consonant, False otherwise
Method	`_measure`	Returns the 'measure' of stem, per definition in the paper
Method	`_replace_suffix`	Replaces `suffix` of `word` with `replacement
Method	`_step1a`	Implements Step 1a from "An algorithm for suffix stripping"
Method	`_step1b`	Implements Step 1b from "An algorithm for suffix stripping"
Method	`_step1c`	Implements Step 1c from "An algorithm for suffix stripping"
Method	`_step2`	Implements Step 2 from "An algorithm for suffix stripping"
Method	`_step3`	Implements Step 3 from "An algorithm for suffix stripping"
Method	`_step4`	Implements Step 4 from "An algorithm for suffix stripping"
Method	`_step5a`	Implements Step 5a from "An algorithm for suffix stripping"
Method	`_step5b`	Implements Step 5a from "An algorithm for suffix stripping"

def __init__(self, ignore_stopwords=False): (source) ¶

overrides nltk.stem.snowball._LanguageSpecificStemmer.__init__

Undocumented