Simple Anagram Generator in Python

anagrams.py

import argparse, itertools
parser = argparse.ArgumentParser()
parser.add_argument('input', help="Initial text for generating anagrams")
parser.add_argument('-d', '--dict', default='/usr/share/dict/cracklib-small',
                   help="A word list such as '/usr/share/dict/words' or '/usr/dict/words'")
args = parser.parse_args()
with open(args.dict, 'r') as fh:
    valid_words = set(line.strip().lower() for line in fh)
anagrams = set(''.join(a) for a in itertools.permutations(list(args.input.lower())) if all(w in valid_words for w in ''.join(a).split()))
for anagram in sorted(anagrams):
    print(anagram)