1. Sort the group
| A | B |
| a | 1 |
| b | 1 |
| c | 1 |
| b | 2 |
| c | 2 |
| a | 2 |
| b | 3 |
| a | 3 |
| c | 3 |
Is converted to the following format:
| A | B |
| a | 1 |
| a | 2 |
| a | 3 |
| b | 1 |
| b | 2 |
| b | 3 |
| c | 1 |
| c | 2 |
| c | 3 |
code show as below
df_sorted = df.groupby('A',sort=False).apply(lambda x:x.sort_values('B',ascending=True)).reset_index(drop=True)
Minimum and then removed after the two data sets are grouped within
df_head_2 = df_sorted.groupedby('A').head(2)