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# -*- coding: utf-8 -*- |
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# Copyright 2019 by Christopher C. Little. |
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# This file is part of Abydos. |
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# |
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# Abydos is free software: you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation, either version 3 of the License, or |
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# (at your option) any later version. |
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# |
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# Abydos is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with Abydos. If not, see <http://www.gnu.org/licenses/>. |
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"""abydos.fingerprint._bwtrle. |
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Burrows-Wheeler transform plus run-length encoding fingerprint |
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""" |
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from __future__ import ( |
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absolute_import, |
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division, |
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print_function, |
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unicode_literals, |
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) |
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from ._fingerprint import _Fingerprint |
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from ..compression import BWT as _BWT |
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from ..compression import RLE as _RLE |
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__all__ = ['BWTRLEF'] |
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class BWTRLEF(_Fingerprint): |
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"""Burrows-Wheeler transform plus run-length encoding fingerprint. |
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This is a wrapper of the BWT and RLE classes in abydos.compression, which |
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provides the same interface as other descendants of _Fingerprint. |
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.. versionadded:: 0.4.1 |
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""" |
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def __init__(self, terminator='\0'): |
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"""Initialize BWTRLEF instance. |
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Parameters |
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---------- |
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terminator : str |
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A character added to signal the end of the string |
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.. versionadded:: 0.4.1 |
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""" |
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self._bwt = _BWT(terminator) |
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self._rle = _RLE() |
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def fingerprint(self, word): |
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r"""Return the run-length encoded Burrows-Wheeler transform of a word. |
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Parameters |
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---------- |
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word : str |
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The word to fingerprint |
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Returns |
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------- |
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str |
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The run-length encoded Burrows-Wheeler transform of a word |
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Examples |
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-------- |
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>>> fp = BWTRLEF() |
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>>> fp.fingerprint('hat') |
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'th\x00a' |
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>>> fp.fingerprint('niall') |
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'linla\x00' |
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>>> fp.fingerprint('colin') |
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'n\x00loic' |
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>>> fp.fingerprint('atcg') |
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'g\x00tca' |
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>>> fp.fingerprint('entreatment') |
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'term\x00teetnan' |
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.. versionadded:: 0.4.1 |
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""" |
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return self._rle.encode(self._bwt.encode(word)) |
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if __name__ == '__main__': |
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import doctest |
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doctest.testmod() |
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chrislit /
abydos
