uid iid val
uid
1 1 1 5 5.5
2 3 1 4 3.5
2 2 1 4 3.5
2 7 1 4 3.5
2 9 1 4 3.5
2 11 1 4 3.5
从以上数据帧,我想删除的第一列,其为:熊猫groupby.apply后下降组柱(..)
uid
1
2
2
2
2
2
并提取
uid iid val
1 1 5 5.5
3 1 4 3.5
2 1 4 3.5
7 1 4 3.5
9 1 4 3.5
11 1 4 3.5
有人可以帮忙吗?