请我想用熊猫计算比率: 对于每个 id、cod、date,我必须计算比率:(sum col where flag=In / som col where flag=OUT + som col where flag=IN)
id cod date flag col
x2 101001 2021-02-18 IN 100
x2 101001 2021-02-18 IN 100
x2 101001 2021-02-18 IN 100
x2 101001 2021-02-18 OUT 300
预期输出:
x2 101001 2021-02-18 IN 0.5
x2 101001 2021-02-18 IN 0.5
x2 101001 2021-02-18 IN 0.5
x2 101001 2021-02-18 OUT 0.5