业务需求和C#的插件实现，参考文章：【二开实现单据保存写入批号主档】，重写一个Python版本的实现，供参考。

import clr
clr.AddReference('System')
clr.AddReference('System.Data')
clr.AddReference('Kingdee.BOS')
clr.AddReference('Kingdee.BOS.Core')
clr.AddReference('Kingdee.BOS.App.Core')
clr.AddReference('Kingdee.BOS.App')
clr.AddReference('Kingdee.BOS.DataEntity')
clr.AddReference('Kingdee.BOS.Business.DynamicForm')
clr.AddReference('Kingdee.BOS.ServiceHelper')
clr.AddReference('Kingdee.BOS.Contracts')

from Kingdee.BOS.Log import Logger
from Kingdee.BOS import *
from Kingdee.BOS.Core import *
from Kingdee.BOS.Contracts import *
from System.Data import *
from System import *
from System.Collections import *
from Kingdee.BOS.App.Data import *
from System.Collections.Generic import List
from System.Collections.Generic import Dictionary
from Kingdee.BOS.Core.DynamicForm.PlugIn import *
from System import StringComparison
from Kingdee.BOS.ServiceHelper import *

def AfterExecuteOperationTransaction(e):
    if(this.OperationResult.IsSuccess == False):
        return
        
    if len(e.DataEntitys) == 0 or e.DataEntitys == None: 
        return
    
    havaUpdateLots = Dictionary[str,str]()
    for bill in e.DataEntitys:
        lotNote = bill["NOTE"].ToString()
        if lotNote == "":
            continue
        
        billEntry = bill["STK_MISCELLANEOUSENTRY"]
        for entry in billEntry:
            lotId = Convert.ToInt64(entry["Lot_Id"])
            if lotId == 0:
                continue
                
            havaUpdateLots.Add(str(lotId), lotNote)
            
    if havaUpdateLots.Count > 0:
        lstSqlObj = List[SqlObject]()    
        lotTmpTable = DBServiceHelper.CreateTemporaryTableName(this.Context)
        BuildUpdateDestLotTmpTable(this.Context, lotTmpTable)
        
        lotDt = DataTable(lotTmpTable);
        otColumn1 = DataColumn();
        otColumn1.ColumnName = "FLOTID"
        lotDt.Columns.Add(otColumn1)
        
        otColumn2 = DataColumn();
        otColumn2.ColumnName = "FLOTNOTE"
        lotDt.Columns.Add(otColumn2)
        
        pythondict = dict(havaUpdateLots)
        for key,value in pythondict.items():
            dr = lotDt.NewRow()
            dr["FLOTID"] = key;
            dr["FLOTNOTE"] = value;
            lotDt.Rows.Add(dr);
            
        DBUtils.BulkInserts(this.Context, lotDt)
        
        sql = '''MERGE INTO T_BD_LOTMASTER IT USING   
                        (
                            SELECT T1.FLOTID, T1.FLOTNOTE FROM {0} T1 JOIN T_BD_LOTMASTER T2 ON T1.FLOTID = T2.FLOTID
                        ) UT ON (IT.FLOTID = UT.FLOTID)
                        WHEN MATCHED THEN UPDATE 
                        SET IT.FNOTETEXT = UT.FLOTNOTE; '''.format(lotTmpTable)
        paras = List[SqlParam]();
        sqlObject = SqlObject(sql, paras)
        lstSqlObj.Add(sqlObject)
        
        if lstSqlObj.Count > 0:
            DBUtils.ExecuteBatch(this.Context, lstSqlObj)
        
def BuildUpdateDestLotTmpTable(ctx, tempTableName):
    sqlTM = " ( FLOTID INT NOT NULL DEFAULT(0), FLOTNOTE NVARCHAR(255) NULL)";
    sql = " CREATE TABLE {0} {1} ".format(str(tempTableName), str(sqlTM)) 
    sqls = List[str]()
    sqls.Add(sql)
    
    guid = Guid.NewGuid()
    idxName = guid.ToString("N").Substring(0, 10)
    sql = " CREATE INDEX IDX_LOTID{0} ON {1} ({2}) ".format(str(idxName), str(tempTableName), "FLOTID")
    sqls.Add(sql)
    DBUtils.ExecuteBatchWithTime(ctx, sqls, sqls.Count, 120)

说明：

1、有时候需要取表头字段，有时取表体字段，根据不同的业务场景针对性修改脚本即可

二开实现单据保存写入批号主档(Python实现).rar

您好老师，BOS里面对应的字段是Note 和批号主档的FLOTNOTE嘛