code: def test_mpu_compress(self, tmpdir):
      if not required_torch_version(max_version=1.13):
          pytest.skip("megatron not compatible with torch >1.13")
      from megatron import mpu
  
      args_defaults = {
          "num_layers": 2,
          "hidden_size": 128,
          "num_attention_heads": 8,
          "max_position_embeddings": 128,
      }
  
      model = get_gpt2_model(args_defaults)
      compressed_model = init_compression(
          model, self.get_ds_config(), mpu=mpu
      )
  
      assert isinstance(
          compressed_model.module.language_model.transformer.layers[
              0
          ].attention.query_key_value,
          ColumnParallelLinear_Compress,
      )
      assert isinstance(
          compressed_model.module.language_model.transformer.layers[
              0
          ].attention.dense,
          RowParallelLinear_Compress,
      )
      assert isinstance(
          compressed_model.module.language_model.transformer.layers[
              0
          ].mlp.dense_h_to_4h,
          ColumnParallelLinear_Compress,
      )
      assert isinstance(
          compressed_model.module.language_model.transformer.layers[
              0
          ].mlp.dense_4h_to_h,
          RowParallelLinear_Compress,
      )
  
imports: import torch
  import pytest
  import random
  import numpy
  from unit.megatron_model import get_gpt2_model
  from deepspeed.compression.compress import init_compression
  from unit.modeling import BertConfig
  from unit.modelingpreln import BertEncoder
  from deepspeed.compression.basic_layer import LinearLayer_Compress, ColumnParallelLinear_Compress, RowParallelLinear_Compress
  from deepspeed.compression.helper import convert_conv1d_to_linear
  from deepspeed.accelerator import get_accelerator
  from deepspeed.runtime.utils import required_torch_version
  from unit.common import DistributedTest
label_desc: Use image node_id 4 for calling the TestCompression obj's underlying member method code with example usage: obj.test_mpu_compress(tmpdir) without return types