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[英]How do I create a new column of max values of a column(corresponding to specific name) using pandas?
[英]How do I create a new column which is the max of another column where similar values grouped together in Pandas Dataframe?
我有一個python數據框,如下所示:
AssignmentID Student Assignment_submitted Passed
1 stud1 1 1
2 stud2 1 1
3 stud3 1 1
4 stud1 2 0
5 stud4 1 1
6 stud1 3 0
我要做的就是將其轉換為以下數據框:
AssignmentID Student Assignment_submitted Passed TotalSubmitted
1 stud1 1 1 3
2 stud2 1 1 1
3 stud3 1 1 1
4 stud1 2 0 3
5 stud4 1 1 1
6 stud1 3 0 3
檢查transform
df['TotalSubmitted']=df.groupby('Student')['Assignment_submitted'].transform('count')
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