After using bproc.loader.load_obj to import the .ply or .obj file, the obj doesn't have the relative funciton

[HMCCMH]

Describe the issue

When I use bproc.loader.load_obj to import the .ply file, the obj doesn't have the function like set_location() or set_local2world_mat.
I try to use the obj.set_loaction([0,0,0.1]), but the object doesn't move along the z-axis.

Minimal code example

import blenderproc as bproc
import numpy as np

def build_pbr_data_BOP(run_time=1,output_dir='/home/cmh/data/BlenderProc/pbr_test/output'):
    bproc.init()

    bolt=bproc.loader.load_obj("model/bolt_z_m_ascii.ply")
    
    bolt.set_shading_mode('auto')
    bolt.hide(True)

    # it didn't work
    bolt.set_location([2,0,1])

    

    # 载入光源
    light=bproc.types.Light()
    light.set_type("SUN")
    light.set_location([0,0,2])
    light.set_energy(1000)


if __name__=='__main__':
    build_pbr_data_BOP(run_time=1)

Files required to run the code

No response

Expected behavior

BlenderProc version

2.6.1

[HMCCMH]

I know the problem that I made

[WHHHHY]

Hey,I also met this problem,could you tell me How to deal with it?

Best regards.