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Python wrapper classes for the CRM-114 Discriminator (http://crm114.sourceforge.net/)

Project description

This project is a Python module to interact with [The CRM-114 Discriminator][2], which handles learning and classification of text streams. While written and used primarily in spam classification, CRM-114 handles text streams of logs, data, etc. just as well with recorded accuracy rates exceeding 99.9%. A wide variety of methods can be used with CRM-114, namely regular expressions, approximate regular expressions, Hidden Markov Model, Orthogonal Sparse Bigrams (OSB), winnow, general correlation, K-Nearest-Neighbor, and bit entropy.

Originally crafted by [Sam Deane][3] of [Elegant Chaos][4] and [Born Sleepy][5], with ongoing improvements and maintenance by [Brian Cline][6].

This module provides a very simplified interface to CRM-114. It does not attempt to expose all of CRM-114’s power; instead it tries to hide almost all of the gory details.

Requirements

Python 2.7 is strongly recommended.

Naturally, the crm binary itself is required, and should be in your path. Follow the instructions here for your operating system to install CRM-114.

### Debian, Ubuntu, et al.

apt-get install crm114

### CentOS, Fedora, Red Hat, et al.

## Install and enable the EPEL repository package rpm -Uvh http://mirror.steadfast.net/epel/6/i386/epel-release-6-8.noarch.rpm yum install –enable-repo=epel crm114

### Everyone else

## If you do not yet have libtre and its headers: curl -O http://crm114.sourceforge.net/tarballs/tre-0.7.5.tar.gz tar -zxf tre-.tar.gz cd tre- ./configure –enable-static make sudo make install cd ..

curl -O http://crm114.sourceforge.net/tarballs/crm114-20100106-BlameMichelson.src.tar.gz tar -zxf crm114-.tar.gz cd crm114.src make sudo make install cd ..

Installation

This is really all you need:

sudo pip install crm114

Usage

To use the module, create an instance of the Classifier class, giving it the path to a directory where the data files will be stored, and a list of all possible category strings–or labels–under which text will be classified.

c = Classifier(‘/path/to/my/data’, [‘good’, ‘bad’])

To teach the classifier object about some text, call the learn method passing in a category (one of the categories that you previously provided), and the text.

c.learn(‘good’, ‘some good text’) c.learn(‘bad’, ‘some bad text’)

To find out what the classifier thinks about a body of text, call the classify method, passing in the text. The result of this method is a pair: the first item is a category best matching the text, and the second item is the confidence/probability of that match.

label, confidence = c.classify(‘some text’)

For a rather contrived but possibly helpful detailed example, see tests/basic.py.

License

Released under the MIT License. See LICENSE file for details.

Original code licensed under GPLv2, re-licensed 29 October 2013 by Sam Deane under the MIT license for further curation, maintenance, and packaging.

[1]: http://en.wikipedia.org/wiki/CRM_114_(fictional_device) [2]: http://crm114.sourceforge.net/ [3]: https://github.com/samdeane [4]: http://www.elegantchaos.com/ [5]: http://bornsleepy.com/ [6]: https://github.com/briancline

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