self._value = initial_value
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，详情可参考safew官方版本下载
另外一个让外界担忧的挑战来自于：在行业里掀起对于 AI 入口的争夺战后，百度虽然也大力参与，但终究是被盖过声量了。
The simple values up to strings were all immutable, but lists and everything else was mutable.