如何根据条件替换列中的值

Question

数据集：

cust no acc no  schme code  product code
0   102283447   809002316863    swmse   rbl finserve
1   102283447   809002661291    ecltl   ecl
2   101124069   809001215907    aksme   akshada
3   101124069   809001211305    aksme   akshada
4   101124069   8090012837146   ecltl   ecl

import pandas as pd
import numpy as np

if ((data['cust no'].duplicated()==True).any() and (data['product code']!='rbl finserve').any()):
    data['new']=='other bc acc'
else:
    data['new']==data['schme code']


data['new']=np.nan
for i in data['product code']:
    if i!='rbl finserve':
        if (data['schme code']=='ecltl').any():
            data['new']=='other ecl bc'
        else: 
            data['new']=data['schme code']

如果帐户超过两个，我想更改 schme 代码。对于那些将第一个帐户产品作为 rbl finserve 的帐户，则不要更改，但如果不是“rbl finserve”，则将 schme 代码从“ecltl”更改为“其他 ecltl bc”

Answer 1

cust no acc no  schme code  product code
0   102283447   809002316863    swmse   rbl finserve
1   102283447   809002661291    ecltl   ecl
2   101124069   809001215907    aksme   akshada
3   101124069   809001211305    aksme   akshada
4   101124069   8090012837146   ecltl   ecl