name job id_number
0 krul painter 125796
1 tim lawyer 789632
2 daisy engg 256498
3 alex dancer 456985
4 mandy arch 456258
5 krul painter 125796
6 tim lawyer 789632
7 tim lawyer 789632
8 tim lawyer 789632
9 daisy engg 256498
10 daisy engg 256498
输出:
dup_Index min_index
0 0
5 0
2 2
9 2
10 2
6 6
7 7
8 8