code: def test_tensor_cache_open_twice(self):
      cache1 = TensorCache(self.TEST_DIR / "multicache")
      cache1["foo"] = torch.tensor([1, 2, 3])
      cache2 = TensorCache(self.TEST_DIR / "multicache")
      assert cache1 is cache2
  
imports: import os
  import pathlib
  import json
  import time
  import shutil
  from filelock import Timeout
  import pytest
  import responses
  import torch
  from allennlp.common.file_utils import FileLock, _resource_to_filename, filename_to_url, cached_path, open_compressed, CacheFile, _Meta, _find_entries, inspect_cache, remove_cache_entries, LocalCacheResource, TensorCache
  from allennlp.common import Params
  from allennlp.modules.token_embedders import ElmoTokenEmbedder
  from allennlp.common.testing import AllenNlpTestCase
  from allennlp.predictors import Predictor
label_desc: Use image node_id 2 for calling the TestTensorCache obj's underlying member method code with example usage: obj.test_tensor_cache_open_twice() without return types