Levenshtein distance function as C Extension for Python 3
See https://en.wikipedia.org/wiki/Levenshtein_distance
python3 setup.py install
>>> import levenshtein
>>> levenshtein.levenshtein("TEST","TESTS")
1
>>> levenshtein.levenshtein("DOG","DOGGOS")
3
python3 -m unittest test_levenshtein.py