【python】自定义类型的对象，可以成为字典的键值么？这里有什么你从没想过的坑呢？
Synopsis
这期视频围绕着如何将自定义类型变成字典可用的键值展开，可能你知道这个问题的答案，但是你绝对想象不到这背后有多少内容你 ...
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