python-string-similarity/strsimpy/weighted_levenshtein_test.py

# Copyright (c) 2018 luozhouyang
#
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# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
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# furnished to do so, subject to the following conditions:
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# The above copyright notice and this permission notice shall be included in all
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# SOFTWARE.

import unittest

from .weighted_levenshtein import WeightedLevenshtein, CharacterSubstitutionInterface


class CharSub(CharacterSubstitutionInterface):

    def cost(self, c0, c1):
        return 1.0


class TestWeightedLevenshtein(unittest.TestCase):

    def test_weighted_levenshtein(self):
        a = WeightedLevenshtein(character_substitution=CharSub())
        s0 = ""
        s1 = ""
        s2 = "上海"
        s3 = "上海市"
        distance_format = "distance: {:.4}\t between {} and {}"
        print(distance_format.format(str(a.distance(s0, s1)), s0, s1))
        print(distance_format.format(str(a.distance(s0, s2)), s0, s2))
        print(distance_format.format(str(a.distance(s0, s3)), s0, s3))
        print(distance_format.format(str(a.distance(s1, s2)), s1, s2))
        print(distance_format.format(str(a.distance(s1, s3)), s1, s3))
        print(distance_format.format(str(a.distance(s2, s3)), s2, s3))


if __name__ == "__main__":
    unittest.main()