def prepare_samples()

in models.py [0:0]


    def prepare_samples(self, sentences, bsize, tokenize, verbose):
        sentences = [[self.bos] + s.split() + [self.eos] if not tokenize else
                     [self.bos] + self.tokenize(s) + [self.eos] for s in sentences]
        n_w = np.sum([len(x) for x in sentences])

        # filters words without w2v vectors
        for i in range(len(sentences)):
            s_f = [word for word in sentences[i] if word in self.word_vec]
            if not s_f:
                import warnings
                warnings.warn('No words in "%s" (idx=%s) have w2v vectors. \
                               Replacing by "</s>"..' % (sentences[i], i))
                s_f = [self.eos]
            sentences[i] = s_f

        lengths = np.array([len(s) for s in sentences])
        n_wk = np.sum(lengths)
        if verbose:
            print('Nb words kept : %s/%s (%.1f%s)' % (
                        n_wk, n_w, 100.0 * n_wk / n_w, '%'))

        # sort by decreasing length
        lengths, idx_sort = np.sort(lengths)[::-1], np.argsort(-lengths)
        sentences = np.array(sentences)[idx_sort]

        return sentences, lengths, idx_sort