code: def world_size(self) -> int:
      # hard code world size to 2
      return 2
  
file_path: pytorch/test/distributed/_tensor/test_convolution_ops.py
imports: import copy
  import torch
  import torch.nn
  from torch.distributed._tensor import DeviceMesh, distribute_module, distribute_tensor, Replicate, Shard
  from torch.testing._internal.common_utils import run_tests
  from torch.testing._internal.distributed._tensor.common_dtensor import DTensorTestBase, with_comms
label_desc: Use image node_id 1 for calling the DistConvolutionOpsTest obj's underlying member method code with example usage: obj.world_size() and returns: int