code: def test_read_write_1(self):
      with ExitStack() as stack:
          # WARNING: opens the files several times! may not work on all platforms
          rank_to_fpath = {
              i: stack.enter_context(tempfile.NamedTemporaryFile()).name
              for i in range(8)
          }
          launch(file_read_write_worker, 8, (rank_to_fpath,))
  
imports: import io
  import tempfile
  import unittest
  from contextlib import ExitStack
  import torch
  import torch.distributed
  import torch.multiprocessing
  from detectron2.utils import comm
  from densepose.evaluation.tensor_storage import SingleProcessFileTensorStorage, SingleProcessRamTensorStorage, SizeData, storage_gather
label_desc: Use image node_id 1 for calling the TestMultiProcessFileTensorStorage obj's underlying member method code with example usage: obj.test_read_write_1() without return types