convert strings to standard format

slugify.py

import re
import unittest
from unicodedata import normalize

# http://en.wikipedia.org/wiki/Clean_URL#Slug
def slugify(string, delim="-"):
    string = normalize("NFKD", string).lower()
    return re.sub(r"\W+", delim, string).strip(delim)

class TestSlugify(unittest.TestCase):
    def test_capitals(self):
        string = "This is a TEST"
        slug = slugify(string)
        self.assertEqual(slug, "this-is-a-test")

    def test_punctuation(self):
        string = "This: a SLUG! T#E*S;T"
        slug = slugify(string)
        self.assertEqual(slug, "this-a-slug-t-e-s-t")

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