iki23

  def calculate(a, b, c, memo={}):
    try:
      value = memo[a, b, c] # return already calculated value
    except KeyError:
      value = heavy_calculation(a, b, c)
      memo[a, b, c] = value # update the memo dictionary
      return value

  def f(x=None): if x is None: x = []

  >python wordlist.py -w wordlist -p wordlist.pkl
  >python wordlist.py -T wordlist wordlist.pkl 10 3
  2.6.6 (r266:84297, Aug 24 2010, 18:46:32) [MSC v.1500 32 bit (Intel)]
  words(wordfile): 142.50 best msec/loop
  words_slower(wordfile): 161.00 best msec/loop
  words_normalized(wordfile): 295.84 best msec/loop
  words_pickled(pickled): 2943.66 best msec/loop

  with open(wordfile) as wordlist:
      return frozenset(wordlist.read().split('\n'))

  with open('/usr/share/dict/words') as wordlist:
      words = set(line[:-1] for line in wordlist)

  import sys
  lookup = '%s\n' % sys.argv[1]
  with open('/usr/share/dict/words') as wordlist:
      [ sys.stdout.write('Dictionary password: %s' % lookup) or sys.exit(1) for line in wordlist if line == lookup ]