Python implementation of Aho-Corasick algorithm for string searching

Overview

Python Implementation of Aho-Corasick Algorithm

Reference: https://cr.yp.to/bib/1975/aho.pdf

Demo

the result of executing the sample in main.py is as follows:

input:

text = 'ahishers'
words = {'he', 'she', 'his', 'hers'}

output:

his from position 1 to 3
he from position 4 to 5
she from position 3 to 5
hers from position 4 to 7
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Comments
  • Please explain motivation in the README

    Please explain motivation in the README

    @Superchen17 This isn't really a bug, but rather a request for information.

    I am curious why you did not use the pip-installable 'pyahocorasick` rather than writing your own. Please don't take this to be a criticism - sometimes there are particular reasons to work with a fresh implementation, e.g., other implementations may not be designed to be used in the way that you have in mind, etc.. Furthermore, I see the benefit in doing an implementation to understand the algorithm better. I also have tried to do implementations 'purely' in one language rather than relying upon libraries written in another language. And, indeed, I post to public GitHub repos things that I am coding for whatever reason without worrying whether it might somehow be useful to anyone else.

    So, if you care to share what your motivation is, I'd like to know. What might be particularly informative is the execution speed of your implementation compared to pyahocorasick.

    Thank you in advance for taking this inquiry in the spirit intended, and happy coding!

    opened by eschen42 0
Owner
Daniel O'Sullivan
Daniel O'Sullivan
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