Python : How can I get Rows which have the max value of the group to which they belong? [duplicate]

Answer 1

>>> print d
     Sp  Mt Value  Count
ID                      
4   MM2  S4    bg     10
5   MM2  S4   dgd      1
6   MM4  S2    rd      2
7   MM4  S2    cb      8
8   MM4  S2   uyi      8

>>> d.groupby('Sp').apply(lambda t: t[t.Count==t.Count.max()])
         Sp  Mt Value  Count
Sp  ID                      
MM2 4   MM2  S4    bg     10
MM4 7   MM4  S2    cb      8
    8   MM4  S2   uyi      8