DataFrame中的prod()函数是返回不同维度上的乘积
prod函数有几个参数
axis(0 or 1)分别代表在纵轴和横轴上进行乘积运算
skipna(Boolean)计算时是否忽略空值
levelint or level name, default None
If the axis is a MultiIndex (hierarchical), count along a particular level, collapsing into a Series
numeric_only(Boolean)是否只计算数值
EXAMPLE
myDF=
I 0 1 2 3 4
0 2 1 2 1 1
1 2 1 1 2 2
2 2 1 1 2 2
3 2 1 2 1 2
myDF.prod(axis=0)=
0 16
1 1
2 4
3 4
4 8
myDF.prod(axis=1) =
0 4
1 8
2 8
3 8