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Pyhfst

DOI

Pyhfst is a pure Python implementation of HFST. The library makes it possible to use HFST optimized lookup FSTs without any C dependencies. Both weighted and unweighted FSTs are supported.

The library will run on all operting systems that support Python 3.

Installation

pip install pyhfst

Pyhfst can run way faster if you have Cython installed. After installing Cython, you must reinstall Pyhfst

pip install cython
pip install --upgrade --force-reinstall pyhfst --no-cache-dir

Usage

import pyhfst

input_stream = pyhfst.HfstInputStream("./analyser")
tr = input_stream.read()
print(tr.lookup("voi"))

>> [['voida+V+Act+Ind+Prs+Sg3', 0.0], ['voida+V+Act+Ind+Prs+ConNeg', 0.0], ['voida+V+Act+Ind+Prt+Sg3', 0.0], ['voida+V+Act+Imprt+Prs+ConNeg+Sg2', 0.0], ['voida+V+Act+Imprt+Sg2', 0.0], ['voi+N+Sg+Nom', 0.0], ['voi+Pcle', 0.0], ['voi+Interj', 0.0]]

Citation

Please cite the library as follows:

Alnajjar, K., & Hämäläinen, M. (2023, December). PYHFST: A Pure Python Implementation of HFST. In Lightning Proceedings of NLP4DH and IWCLUL 2023 (pp. 32-35).

@article{pyhfst_2023, 
    title={PyHFST: A Pure Python Implementation of HFST},
    author={Alnajjar, Khalid and H{\"a}m{\"a}l{\"a}inen, Mika},
    booktitle={Lightning Proceedings of NLP4DH and IWCLUL 2023},
    pages={32--35},
    year={2023} 
}