【python 分组累加求和】快速叫你分组求和和分组累加求和

# -*- encoding=utf-8 -*- import pandas as pd data=['abc','abc','abc','asc','ase','ase','ase'] num=[1,2,2,1,2,1,2] df1=pd.DataFrame({'name':data,'num':num}) print(df1) df1['mmm']=df1['num'] df2=df1.gr

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