相关疑难解决方法(0)

我想将数据框分组为两列,然后对组内的聚合结果进行排序.

In [167]:
df

Out[167]:
count   job source
0   2   sales   A
1   4   sales   B
2   6   sales   C
3   3   sales   D
4   7   sales   E
5   5   market  A
6   3   market  B
7   2   market  C
8   4   market  D
9   1   market  E

In [168]:
df.groupby(['job','source']).agg({'count':sum})

Out[168]:
            count
job     source  
market  A   5
        B   3
        C   2
        D   4
        E   1
sales   A   2
        B   4
        C   6
        D   3
        E   7

我现在想在每个组中按降序对count列进行排序.然后只占前三行.得到类似的东西:

            count
job …