pandas 分组依据、聚集和排序索引

mwg9r5ms 于 2022-12-21 发布在其他

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# I wrote this but it is geting error. can anyone explain
a =  reviews.groupby("price").agg(max).sort_index("points")

Note:- price and points are integers.

Error

对象类型DataFrame没有名为price的轴

# This is working fine but i didn't understand this?
b  = reviews.groupby('price')['points'].max().sort_index()

pandas

来源：https://stackoverflow.com/questions/74833821/group-by-and-agg-and-sort-index

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按热度按时间

bn31dyow1#

当你想使用聚合方法时，你必须确定哪个聚合函数应用于哪个列。第一个代码引发错误，因为你没有确定要聚合的列

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pandas 分组依据、聚集和排序索引

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