# Copyright 2014-2020 by Christopher C. Little.
# This file is part of Abydos.
#
# Abydos is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Abydos is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Abydos. If not, see <http://www.gnu.org/licenses/>.
"""abydos.stemmer._clef_swedish.
CLEF Swedish stemmer
"""
from deprecation import deprecated
from ._stemmer import _Stemmer
from .. import __version__
__all__ = ['CLEFSwedish', 'clef_swedish']
[docs]class CLEFSwedish(_Stemmer):
"""CLEF Swedish stemmer.
The CLEF Swedish stemmer is defined at :cite:`Savoy:2005`.
.. versionadded:: 0.3.6
"""
[docs] def stem(self, word):
"""Return CLEF Swedish stem.
Parameters
----------
word : str
The word to stem
Returns
-------
str
Word stem
Examples
--------
>>> clef_swedish('undervisa')
'undervis'
>>> clef_swedish('suspension')
'suspensio'
>>> clef_swedish('visshet')
'viss'
.. versionadded:: 0.1.0
.. versionchanged:: 0.3.6
Encapsulated in class
"""
wlen = len(word) - 2
if wlen > 2 and word[-1] == 's':
word = word[:-1]
wlen -= 1
_endings = {
5: {'elser', 'heten'},
4: {'arne', 'erna', 'ande', 'else', 'aste', 'orna', 'aren'},
3: {'are', 'ast', 'het'},
2: {'ar', 'er', 'or', 'en', 'at', 'te', 'et'},
1: {'a', 'e', 'n', 't'},
}
for end_len in range(5, 0, -1):
if wlen > end_len and word[-end_len:] in _endings[end_len]:
return word[:-end_len]
return word
[docs]@deprecated(
deprecated_in='0.4.0',
removed_in='0.6.0',
current_version=__version__,
details='Use the CLEFSwedish.stem method instead.',
)
def clef_swedish(word):
"""Return CLEF Swedish stem.
This is a wrapper for :py:meth:`CLEFSwedish.stem`.
Parameters
----------
word : str
The word to stem
Returns
-------
str
Word stem
Examples
--------
>>> clef_swedish('undervisa')
'undervis'
>>> clef_swedish('suspension')
'suspensio'
>>> clef_swedish('visshet')
'viss'
.. versionadded:: 0.1.0
"""
return CLEFSwedish().stem(word)
if __name__ == '__main__':
import doctest
doctest.testmod()