Python vs Clojure

norvig-spell-checker.clj

(defn words [x] (re-seq #"[a-z]+" (lower-case x)))
(def NWORDS (frequencies (words (slurp "big.txt")))) ; @TODO: Move from slurp.

norvig-spell-checker.py

def words(text): return re.findall('[a-z]+', text.lower())

def train(features):
    model = collections.defaultdict(lambda: 1)
    for f in features:
        model[f] += 1
    return model

NWORDS = train(words(file('big.txt').read()))