def pad_sentences(wordlist, padding=20):
padded_wordlist = []
padding_token = Word()
padding_token.set_as_pad_token()
for s in wordlist:
padded = [padding_token] * padding
if len(s) > padding:
padded = s[:padding]
else:
padded[padding-len(s):] = s
padded_wordlist.append(padded)
return padded_wordlist
