only textblks with non-empty source text would be passed to translators #256

        return [text.lstrip().rstrip() for text in text_list]

    def translate_textblk_lst(self, textblk_lst: List[TextBlock]):

        text_list = [blk.get_text() for blk in textblk_lst]

        translations = self.translate(text_list)

        '''

        only textblks with non-empty source text would be passed to translator

        '''

        non_empty_ids = []

        text_list = []

        translations = []

        for ii, blk in enumerate(textblk_lst):

            text = blk.get_text()

            if text.strip() != '':

                non_empty_ids.append(ii)

                text_list.append(text)

            translations.append(text)

        if len(text_list) > 0:

            _translations = self.translate(text_list)

            for ii, idx in enumerate(non_empty_ids):

                translations[idx] = _translations[ii]

        for callback_name, callback in self._postprocess_hooks.items():

            callback(translations = translations, textblocks = textblk_lst, translator = self)