Example Program: Most Frequent Words

import string, sys

text = open(sys.argv[1],'r').read()
text = text.lower()
for ch in string.punctuation:
    text = text.replace(ch, ' ')

counts = {}
for w in text.split():
    counts[w] = counts.get(w,0) + 1

items = []
for w,c in counts.items():
    items.append((c,w))
items.sort()
items.reverse()

for i in range(10):
    c,w = items[i]
    print w, c