passphrase creation script

#!/usr/bin/env python

import re
import sys
import random

wordre = re.compile("\w+")
filename = sys.argv[-1]

wordset = set()

f = open(filename)

try:
    for line in f:
        words = wordre.findall(line)
        for word in words:
            wordset.add(word.lower())
finally:
    f.close()

wordlist = list(wordset)

passphrase = [random.choice(wordlist) for x in range(7)]

print(filename)

print("{:n} unique words".format(len(wordlist)))

print(" ".join(passphrase))