python - 在 SeriesGroupBy 上使用集合并集
问题描述
假设我有一个像上面这样的数据框（df），我想在 items 列上运行 df.groupby(['id', 'client']) 和应用联合？结果应该是一行 -> id = 1 并且客户端 = 70 项 = {1,2,3,4,5,6,7}。
我很感激这方面的任何帮助！
解决方案
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