Some code around problems in Letterpress game

wordplay.py

#from wordnik import *
#apiUrl = 'http://api.wordnik.com/v4'
#apiKey = '2c07cd1bf3e00c740000803bdbd0bc4ffe1a45a8e22f67fb5'
#client = swagger.ApiClient(apiKey, apiUrl)

#from PyDictionary import PyDictionary
#dictionary=PyDictionary()

# not efficient
def is_subseq(x, y):
    it = iter(y)
    return all(c in it for c in x)

def intersection(x, y):
    common = set(x) & set(y)
    return bool(common)

hash = {}
with open('words.txt', 'r') as f:
    for line in f:
        word = line.split('\n')[0]
        key = ''.join(sorted(word))
        if key in hash:
            hash.get(key).append(word)
        else:
            hash[key] = [word]


search_word = 'undersaat'
search_exclude = 'io'
search_key = ''.join(sorted(search_word))
exclude_key = ''.join(sorted(search_exclude))
print search_key
print exclude_key

for key in hash:
    if is_subseq(search_key,key):
        if not intersection(search_exclude, key):
            print key, hash[key]