Python 扩展数据帧列'；将内容添加到几个新列中

我的原始数据帧如下所示：

StudentId   DepartmentName  
1   Arts    86.677535
    Science 79.557508
2   Arts    79.542738
    Science 78.867115
3   English 83.972245
... ... ...
277 Science 81.298837
278 Science 72.578017
    Sport   76.749775
280 Arts    77.237998
    Science 75.696576

我想将其转换为：

StudentId  Arts        Science     English     Sport
1           86.677535  79.557508    NaN        Nan
2           79.542738  78.867115    NaN        Nan
3           Nan        Nan          83.972245  Nan
... ... ...

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使用熊猫。取消堆叠

df.unstack(level=-1)

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使用熊猫。取消堆叠

df.unstack(level=-1)