我的数据框看起来像这样:
ID Date Name ColA ColB ColC ColD Column_Interest
1 09/12 Ann String String String String OneThing
2 09/13 Pete String String String String OneThing
2 09/13 Pete String String String String AnotherThing
3 09/13 Ann String String String String OneThing
3 09/13 Ann String String String String AnotherThing
3 09/13 Ann String String String String ThirdThing
4 09/12 Pete String String String String OneThing
我想做什么: