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py-aho-corasick

Project Description
===============================
py-aho-corasick
===============================


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py-aho-corasick


* Free software: MIT license
* The prototype is inspired by and borrowed from `Carolyn Shen <http://carshen.github.io/data-structures/algorithms/2014/04/07/aho-corasick-implementation-in-python.html>`_

Features
--------

* Aho-Corasick's Trie structure and Failure State Transition
* String searching algorithm for multi-pattern keywords
* Pure Python implementation
* Python2 && Python3 support

Usage
--------

::

import py_aho_corasick

# keywords only
py_aho_corasick.init_trie(['cash', 'shew', 'ew'])
text = "cashew"
for idx,k,v in py_aho_corasick.get_keywords_found(text):
assert text[idx:idx+len(k)] == k

# keywords and values
kv = [('cash',1), ('shew',2), ('ew',3)]
py_aho_corasick.init_trie(kv)
text = "cashew"
for idx,k,v in py_aho_corasick.get_keywords_found(text):
assert text[idx:idx+len(k)] == k
assert v == dict(kv)[k]


Performance
--------

Compared with `pyahocorasick <https://github.com/WojciechMula/pyahocorasick>`_

You can run the testing script to get this::

# Requirements:
# pip install pyahocorasick
python cmp.py

* pyahocorasick: text of 1000000 length, 1000 keywords, building time 0.026426076889038086 and searching time cost 0.047805070877075195
* py_aho_corasick: text of 1000000 length, 1000 keywords, building time 0.47435593605041504 and searching time cost 4.24287486076355

Development
--------

::
# testing with diff versions' Python
tox


TODO
--------

* Pickle test


=======
History
=======

0.1.0 (2017-04-17)
------------------

* First release on PyPI.
Release History

Release History

This version
History Node

1.0.0

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