Skip to main content
This is a pre-production deployment of Warehouse. Changes made here affect the production instance of PyPI (
Help us improve Python packaging - Donate today!

A multi-purpose sequential tagger wrapped around CRFSuite

Project Description


_CRFSuiteTagger_ is a sequence tagger based on the [pycrfsuite]( "pycrfsuite") python wrapper for [CRFSuite]( "CRFSuite"). It is built for chunking, NER, and other BIO (also referred to as IOB) based text annotation tasks.

### Why would you need this?

_CRFSuiteTagger_ has a wide selection of common features, and the capability to easily integrate additional ones. The features are controlled using a simple string-based feature template. Additional features can be easily added through new _feature generating functions_ (see `crfsuitetagger.ftex`) passed on the `CRFSuiteTagger` constructor.

### Installation

You should be able to install _CRFSuiteTagger_ as any other Python package:

python install

### Dependencies

You will need the following Python packages and one of my other libraries:

* [pycrfsuite]( "pycrfsuite") - python wrapper for CRFSuite
* [numpy]( "NumPy") - you should it
* [bioeval]( "bioeval") - my library for evaluating BIO style annotation, which replaces the perl script from [CoNLL-2000](

### TODO

* command line interface
* migrate data structure to [pandas]( "pandas")
* more examples

### See Also

If you are interested in other sequence taggers, you might want to look at:

* [Stanford NLP]( -- POS tagger
* [ARK]( -- POS tagger for tweets
* [YamCha]( -- BIO tagger/chunker
* [CRF++]( -- BIO tagger/chunker
* [Wapiti]( -- POS & BIO tagger/chunker

Release History

This version
History Node


Download Files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Filename, Size & Hash SHA256 Hash Help File Type Python Version Upload Date
(22.4 kB) Copy SHA256 Hash SHA256
Source None Sep 10, 2016

Supported By

Elastic Elastic Search Pingdom Pingdom Monitoring Dyn Dyn DNS Sentry Sentry Error Logging CloudAMQP CloudAMQP RabbitMQ Heroku Heroku PaaS Kabu Creative Kabu Creative UX & Design Fastly Fastly CDN DigiCert DigiCert EV Certificate Google Google Cloud Servers DreamHost DreamHost Log Hosting