dive to python - functions

multilize.py

patterns = (
    ('[sxz]$', '$', 'es'),
    ('[^aeioudgkprt]h$', '$', 'es'),
    ('[^aeiou]y$', 'y$', 'ies'),
    ('$', '$', 's')
)

def mls(pattern, remove, replace):
    def match(word):
        return re.search(pattern, word)
    def apply(word):
        return re.sub(remove, replace, word)
    return (match, apply)

rules = [ mls(pattern, remove, replace)
          for (pattern, remove, replace) in patterns]

def nls(noun):
    for (match, apply) in rules:
        if match(noun):
            return apply(noun)