单据转换python插件如下：
import clr
clr.AddReference("Kingdee.BOS.Core")
clr.AddReference("Kingdee.BOS.DataEntity")

from Kingdee.BOS.DataEntity import *
from Kingdee.BOS.Core.Metadata.FieldElement import *

def AfterConvert(e):
    headEntity = e.Result.FindByEntityKey("FBillHead")
    for item in headEntity:
        data=item["PAYBILLENTRY"]
        src=item["PAYBILLSRCENTRY"]
        if len(data)!=len(src):
            continue
        for index in range(len(data)):
            data[index]["FEXPENSEDEPTID_E_ID"]=src[index]["FEXPENSEDEPTID_ID"]
            data[index]["FEXPENSEDEPTID_E"]=src[index]["FEXPENSEDEPTID"]

原链接：收付款单支持携带上游二开字段到明细，配置即可 (kingdee.com)