def build_vocab()

in models.py [0:0]


    def build_vocab(self, sentences, tokenize=True):
        assert hasattr(self, 'w2v_path'), 'w2v path not set'
        word_dict = self.get_word_dict(sentences, tokenize)
        self.word_vec = self.get_w2v(word_dict)
        print('Vocab size : %s' % (len(self.word_vec)))