如何获得pandas中groupby对象的组数量？ [英] How to get number of groups in a groupby object in pandas?

问题描述

这很有用，所以我知道有多少独特的组必须进行计算。谢谢。

假设groupby对象叫做 dfgroup 。 ＃groupby-object-attributes>记录在案，你可以得到 len（dfgroup）的组数。

This would be useful so I know how many unique groups I have to perform calculations on. Thank you.

Suppose groupby object is called dfgroup.

解决方案

As documented, you can get the number of groups with len(dfgroup).

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