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Python stemming library using snowball stemmers
License: Other
This project forked from snowballstem/pystemmer
Python stemming library using snowball stemmers
License: Other
PyStemmer ========= What is PyStemmer? ------------------ PyStemmer is a Python interface to the stemming algorithms from the Snowball project (http://snowball.tartarus.org/). A stemming algorithm (or stemmer) is a process for removing the commoner morphological and inflexional endings from words in English. Its main use is as part of a term normalisation process that is usually done when setting up Information Retrieval systems. A stemmer aims to conflate words with the same linguistic base form, in order that the resulting "stem" may be considered to represent all words with that base form. Stemmers can be used to make searches more comprehensive. For example, stemming can ensure that a search for 'cars' will also find all documents that contain only 'car'. Snowball is a small string processing language designed for creating stemming algorithms for use in Information Retrieval. It is also the name of a project to develop a good base set of stemming algorithms. PyStemmer uses the "libstemmer_c" C interface to the snowball algorithms, provided by the snowball project itself. This library is unmodified, but contained within the PyStemmer distribution. If you wish to upgrade PyStemmer to a more recent version of libstemmer_c (or the snowball algorithms), it should suffice to download a new copy of libstemmer_c from the snowball project, and replace the contents of the libstemmer_c subdirectory with the contents of the download. Requirements ------------ This version of PyStemmer has been tested using Python version 2.7.1, but should work with earlier versions. It has also been tested using Python version 3.2rc3. Installation ------------ The snowball stemming algorithms are included in the PyStemmer distribution, and PyStemmer uses distutils, so all that is neccessary to build and install PyStemmer is the usual distutils invocation: python setup.py build python setup.py install API --- PyStemmer's API is documented by documentation comments, which may conveniently be viewed using the epydoc output present in the docs/html/ subdirectory. A brief overview can be found in docs/quickstart.txt License ------- PyStemmer is copyright (c) 2006, Richard Boulton, and is licensed under the MIT license: see the file "LICENSE" for the full text of this. It is was inspired by an earlier implementation (which was copyright (c) 2001, Andreas Jung, and also licensed under the MIT license, but no portions of which remain in this package, and had a different API). The snowball algorithms, and the snowball library, are copyright (c) 2001-2006, Dr Martin Porter and Richard Boulton, and are licensed under the BSD license.
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