understanding MultiIndex

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情书的邮戳
情书的邮戳 2021-01-06 06:15

So I have a sample data set like this in csv:-

name    team    date       score
John    A   3/9/12      100
John    B   3/9/12      99
Jane    B   4/9/12             


        
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  • 2021-01-06 06:42

    as an alternative solution, if -for whatever reason- you want to keep the multi-indexing in the read_csv statement.

    Same dataset.

    df = pd.read_csv("Workbook1.csv", index_col=["team", "name"])
    df.stack().unstack()
    
            date    score
    team    name        
    A   John    3/9/2012    100
        Peter   9/9/2012    103
        Rachel  30/10/12    98
    B   Jane    4/9/2012    102
        John    3/9/2012    99
        Kate    31/10/12    103
    C   David   1/11/2012   104
        Josie   11/9/2012   111
    
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  • 2021-01-06 06:47

    Figured it out myself.

    df = read_csv("data/Workbook1.csv")
    
    df
    
         name team      date  score
    0    John    A    3/9/12    100
    1    John    B    3/9/12     99
    2    Jane    B    4/9/12    102
    3   Peter    A    9/9/12    103
    4   Josie    C   11/9/12    111
    5  Rachel    A  30/10/12     98
    6    Kate    B  31/10/12    103
    7   David    C   1/11/12    104
    
    df2 = df.pivot('team', 'name').stack()
    
    df2
    
                     date  score
    team name                   
    A    John      3/9/12    100
         Peter     9/9/12    103
         Rachel  30/10/12     98
    B    Jane      4/9/12    102
         John      3/9/12     99
         Kate    31/10/12    103
    C    David    1/11/12    104
         Josie    11/9/12    111
    
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