📅  最后修改于: 2022-03-11 14:45:48.389000             🧑  作者: Mango
代码示例3
In [11]: df.groupby(['col5', 'col2']).size()
Out[11]:
col5 col2
1 A 1
D 3
2 B 2
3 A 3
C 1
4 B 1
5 B 2
6 B 1
dtype: int64