permutations of words

perm.py

import copy, sys

words = set()
def load():
    for f in open('words.txt').readlines():
        words.add(f.strip())

#
# sr - string
# all - output set
# remaining - reminaing array
def perm(sr, all, remaining):
    for c in remaining:
        nw = sr + c
        if (len(nw)>2):
            all.add(nw)
        p = copy.copy(remaining)
        p.remove(c)
        perm(nw, all, p)

s = set()
load()
perm('', s, [f for f in sys.argv[1]])
for f in s.intersection(words): print f