大家好，我是程序员晚枫。01我面试了一个写了4年Python的程序员。我问他："装饰器的底层原理是什么？"他说："就是在函数外面包一层..."我又问："functools.wraps是干嘛的？"他说："保持原函数的信息...大概..."我没有继续追问第三题。不是因为他的回答完全错误，而是我发现——他不是不努力，他是真的"不知道自己不知道"。

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