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https://github.com/clips/pattern

Web mining module for Python, with tools for scraping, natural language processing, machine learning, network analysis and visualization.
https://github.com/clips/pattern

machine-learning natural-language-processing network-analysis python sentiment-analysis web-mining wordnet

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Web mining module for Python, with tools for scraping, natural language processing, machine learning, network analysis and visualization.

Lists

README 

        
Pattern

=======



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Pattern is a web mining module for Python. It has tools for:



 * Data Mining: web services (Google, Twitter, Wikipedia), web crawler, HTML DOM parser

 * Natural Language Processing: part-of-speech taggers, n-gram search, sentiment analysis, WordNet

 * Machine Learning: vector space model, clustering, classification (KNN, SVM, Perceptron)

 * Network Analysis: graph centrality and visualization.



It is well documented, thoroughly tested with 350+ unit tests and comes bundled with 50+ examples. The source code is licensed under BSD.



![Example workflow](https://raw.githubusercontent.com/clips/pattern/master/docs/g/pattern_schema.gif)



Example

-------



This example trains a classifier on adjectives mined from Twitter using Python 3. First, tweets that contain hashtag #win or #fail are collected. For example: *"$20 tip off a sweet little old lady today #win"*. The word part-of-speech tags are then parsed, keeping only adjectives. Each tweet is transformed to a vector, a dictionary of adjective → count items, labeled `WIN` or `FAIL`. The classifier uses the vectors to learn which other tweets look more like `WIN` or more like `FAIL`.



```python

from pattern.web import Twitter

from pattern.en import tag

from pattern.vector import KNN, count



twitter, knn = Twitter(), KNN()



for i in range(1, 3):

    for tweet in twitter.search('#win OR #fail', start=i, count=100):

        s = tweet.text.lower()

        p = '#win' in s and 'WIN' or 'FAIL'

        v = tag(s)

        v = [word for word, pos in v if pos == 'JJ'] # JJ = adjective

        v = count(v) # {'sweet': 1}

        if v:

            knn.train(v, type=p)



print(knn.classify('sweet potato burger'))

print(knn.classify('stupid autocorrect'))

```



Installation

------------



Pattern supports Python 2.7 and Python 3.6. To install Pattern so that it is available in all your scripts, unzip the download and from the command line do:

```bash

cd pattern-3.6

python setup.py install

```



If you have pip, you can automatically download and install from the [PyPI repository](https://pypi.python.org/pypi/pattern):

```bash

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:\python36\Lib\site-packages\` (Windows),

  * `/Library/Python/3.6/site-packages/` (Mac OS X),

  * `/usr/lib/python3.6/site-packages/` (Unix).

- Add the location of the module to `sys.path` in your script, before importing it:



```python

MODULE = '/users/tom/desktop/pattern'

import sys; if MODULE not in sys.path: sys.path.append(MODULE)

from pattern.en import parsetree

```



Documentation

-------------



For documentation and examples see the [user documentation](https://github.com/clips/pattern/wiki).



Version

-------



3.6



License

-------



**BSD**, see `LICENSE.txt` for further details.



Reference

---------



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



Contribute

----------



The source code is hosted on GitHub and contributions or donations are welcomed.



Bundled dependencies

--------------------



Pattern is bundled with the following data sets, algorithms and Python packages:



- **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.)

- **Brill tagger for French**, trained on Lefff (Benoît Sagot & Lionel Clément et al.)

- **Brill tagger for Italian**, mined from Wiktionary

- **English pluralization**, Damian Conway

- **Spanish verb inflection**, Fred Jehle

- **French verb inflection**, Bob Salita

- **Graph JavaScript framework**, Aslak Hellesoy & Dave Hoover

- **LIBSVM**, Chih-Chung Chang & Chih-Jen Lin

- **LIBLINEAR**, Rong-En Fan et al.

- **NetworkX centrality**, Aric Hagberg, Dan Schult & Pieter Swart

- **spelling corrector**, Peter Norvig



Acknowledgements

----------------



**Authors:**



- Tom De Smedt ([email protected])

- Walter Daelemans ([email protected])



**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

- Antoine Mazières + fabelier.org

- Rémi de Zoeten + closealert.nl

- Kenneth Koch

- Jens Grivolla

- Fabio Marfia

- Steven Loria

- Colin Molter + tevizz.com

- Peter Bull

- Maurizio Sambati

- Dan Fu

- Salvatore Di Dio

- Vincent Van Asch

- Frederik Elwert