Extract row with maximum value in a group pandas dataframe

Question

A similar question is asked here: Python : Getting the Row which has the max value in groups using groupby

However, I just need one record per group even if there ar

Answer 1

You can use first

In [14]: df.groupby('Mt').first()
Out[14]: 
   Sp  Value  count
Mt                 
s1  a      1      3
s2  c      3      5
s3  f      6      6

Update

Set as_index=False to achieve your goal

In [28]: df.groupby('Mt', as_index=False).first()
Out[28]: 
   Mt Sp  Value  count
0  s1  a      1      3
1  s2  c      3      5
2  s3  f      6      6 

Update Again

Sorry for misunderstanding what you mean. You can sort it first if you want the one with max count in a group

In [196]: df.sort('count', ascending=False).groupby('Mt', as_index=False).first()
Out[196]: 
   Mt Sp  Value  count
0  s1  a      1      3
1  s2  e      5     10
2  s3  f      6      6