'check if all tasks are done, according to self._number_dict'

def is_all_tasks_done(self):

    return (False if (self._number_dict[TPEnum.TASKS_RUNNING] or self._number_dict[TPEnum.URL_NOT_FETCH] or self._number_dict[TPEnum.HTM_NOT_PARSE] or self._number_dict[TPEnum.ITEM_NOT_SAVE]) else True)
