从给定索引中选择3个（或n个）观察值

Question

我正在尝试对每个指数进行3个最高的观察。例如，我有

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我想对AL和AK进行3次最高观察，并将其作为其他系列进行观察。谢谢。

Answer 1

您可以进行census.groupby(level=0).nlargest(3)

感谢@coldspeed