python lookup（）

在提供的代码中，似乎没有找到名为"lookup()"的函数。它可能是作者自定义的函数或者在引用所提供的代码中未包含在代码片段中。因此，无法提供关于"python lookup()"的具体信息。如果您可以提供更多关于这个函数的上下文或信息，我将尽力帮助解答。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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