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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def dump(self):
 """ Dump the TDS results to the output `dat` file :return: succeed flag """

        logger.warn('This function is deprecated and replaced by `dump_np_vars`.')

        ret = False

        if self.system.files.no_output:
            # return ``True`` because it did not fail
            return True

        if self.write_lst() and self.write_dat():
            ret = True

        return ret