Pattern

Pattern is a web mining module for the Python programming language. It bundles tools for:

Data Mining: Google + Twitter + Wikipedia API, web spider, HTML DOM parser
Natural Language Processing: tagger/chunker, n-gram search, sentiment analysis, WordNet
Machine Learning: vector space model, k-means clustering, Naive Bayes + k-NN + SVM classiﬁers
Network Analysis: graph centrality and visualization.

It is well documented and bundled with 30+ examples and 350+ unit tests. The source code is licensed under BSD and available from http://www.clips.ua.ac.be/pages/pattern.

Version

2.4

License

BSD, see LICENSE.txt for further details.

Installation

Pattern is written for Python 2.5+ (no support for Python 3 yet). The module has no external dependencies except when using LSA in the pattern.vector module, which requires NumPy (installed by default on Mac OS X). To install Pattern so that it is available in all your scripts, unzip the download and from the command line do:

cd pattern-2.4
python setup.py install

If you have pip, you can automatically download and install from the PyPi repository:

pip install pattern

If none of the above works, you can make Python aware of the module in three ways:

Put the pattern folder in the same folder as your script.
Put the pattern folder in the standard location for modules so it is available to all scripts:
- c:\python26\Lib\site-packages\ (Windows),
- /Library/Python/2.6/site-packages/ (Mac OS X),
- /usr/lib/python2.6/site-packages/ (Unix).
Add the location of the module to sys.path in your script, before importing it:

  MODULE = '/users/tom/desktop/pattern'
  import sys; if MODULE not in sys.path: sys.path.append(MODULE)
  from pattern.en import parse, Sentence

Documentation

http://www.clips.ua.ac.be/pages/pattern

Reference

De Smedt, T., Daelemans, W. (2012). Pattern for Python. Journal of Machine Learning Research, 13, 2031–2035.

Bundled dependencies

Pattern is bundled with the following algorithms and Python packages:

Beautiful Soup, Leonard Richardson
Brill tagger, Eric Brill
Brill tagger for Dutch, Jeroen Geertzen,
Brill tagger for German, Gerold Schneider & Martin Volk
Brill tagger for Spanish, trained on Wikicorpus (Samuel Reese & Gemma Boleda et al.)
English pluralization, Damian Conway
Spanish verb inflection, Fred Jehle
Graph JavaScript framework, Aslak Hellesoy & Dave Hoover
LIBSVM, Chih-Chung Chang & Chih-Jen Lin
NetworkX centrality, Aric Hagberg, Dan Schult & Pieter Swart
PDFMiner, Yusuke Shinyama
PyWordNet, Oliver Steele
simplejson, Bob Ippolito
spelling corrector, Peter Norvig
Universal Feed Parser, Mark Pilgrim
WordNet, Christiane Fellbaum et al.

Acknowledgements

Authors:

Tom De Smedt (tom@organisms.be)
Walter Daelemans (walter.daelemans@ua.ac.be)

Contributors (chronological):

Frederik De Bleser
Jason Wiener
Daniel Friesen
Jeroen Geertzen
Thomas Crombez
Ken Williams
Peteris Erins
Rajesh Nair
F. De Smedt
Radim Řehůřek
Tom Loredo
John DeBovis
Thomas Sileo
Gerold Schneider
Martin Volk
Samuel Joseph
Shubhanshu Mishra
Robert Elwell
Fred Jehle

jasti/pattern