code: def world_size(self) -> int:
      return 8
  
file_path: pytorch/test/distributed/_tensor/test_redistribute.py
imports: import itertools
  import torch
  from torch.distributed._tensor import DeviceMesh, distribute_tensor, DTensor
  from torch.distributed._tensor.placement_types import _Partial, 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 MultiDimRedistributeTest obj's underlying member method code with example usage: obj.world_size() and returns: int