python maya reference set namespace and transform

import pymel.core as pm
import json
import sys
import os

standins = pm.ls(type='aiStandIn')
standinTransforms = [pm.listRelatives(standin, parent=True, f=True)[0] for standin in standins]

assXYZ = {}
missing = []
lightRoot = "J:/xkx/work/lib/lig_set/PR/"
for standin, transform in zip(standins, standinTransforms):
    xformDict = {}
    xformDict['tx'] = transform.tx.get()
    xformDict['ty'] = transform.ty.get()
    xformDict['tz'] = transform.tz.get()
    xformDict['rx'] = transform.rx.get()
    xformDict['ry'] = transform.ry.get()
    xformDict['rz'] = transform.rz.get()
    xformDict['sx'] = transform.sx.get()
    xformDict['sy'] = transform.sy.get()
    xformDict['sz'] = transform.sz.get()

    filename = standin.dso.get().split("/")[-1]
    if 'MA' in filename:
        index = filename.find('MA') + 2  # Find the index of the 'MA' substring and add 2 to skip over it
        digits = filename[index:index+3]  # Extract the 3 digits starting at the index
        if digits.isdigit():  # Check if the extracted substring consists only of digits
            print(digits)
        else: continue
    else: continue
    assName = "MA"+digits+"Night"

    nodeName = transform.name().split("_")[-1].split("|")[-1]
    new_name = str(ass_name + "_" + node_name).replace(":", "")

    lightFolder = lightRoot+assName
    if not os.path.isdir(lightFolder): continue
    maFile = lightFolder+"/"+assName+"_light.ma"
    refNode = pm.createReference(maFile,  namespace=new_name)
    lightGrp = pm.ls(new_name+":*",assemblies=True)[0]
    lightGrp.setTranslation([xformDict['tx'], xformDict['ty'], xformDict['tz']])
    lightGrp.setRotation([xformDict['rx'], xformDict['ry'], xformDict['rz']])
    lightGrp.setScale([xformDict['sx'], xformDict['sy'], xformDict['sz']])