我原来的 DataFrame 看起来像这样:
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
... ... ...
qq_笑_17
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