code: def test_world_size_1(self):
      assert dist.get_world_size() == 1
  
imports: import os
  import torch
  import deepspeed.comm
  import deepspeed
  from unit.common import DistributedTest, DistributedFixture, get_master_port
  from unit.simple_model import SimpleModel
  from deepspeed.accelerator import get_accelerator
  import pytest
  from deepspeed.ops.op_builder import FusedAdamBuilder
label_desc: Use image node_id 2 for calling the TestWorldSizeOverrideDistTest obj's underlying member method code with example usage: obj.test_world_size_1() without return types