Python/other/anagrams.py

from __future__ import print_function
import collections, pprint, time, os

start_time = time.time()
print('creating word list...')
path = os.path.split(os.path.realpath(__file__))
with open(path[0] + '/words') as f:
    word_list = sorted(list(set([word.strip().lower() for word in f])))

def signature(word):
    return ''.join(sorted(word))

word_bysig = collections.defaultdict(list)
for word in word_list:
    word_bysig[signature(word)].append(word)

def anagram(myword):
    return word_bysig[signature(myword)]

print('finding anagrams...')
all_anagrams = {word: anagram(word)
                for word in word_list if len(anagram(word)) > 1}

print('writing anagrams to file...')
with open('anagrams.txt', 'w') as file:
    file.write('all_anagrams = ')
    file.write(pprint.pformat(all_anagrams))

total_time = round(time.time() - start_time, 2)
print(('Done [', total_time, 'seconds ]'))