code: def test_pipe_without_rpc():
      model = nn.Sequential(nn.Linear(1, 1))
      with pytest.raises(
          RuntimeError, match="Please initialize RPC framework"
      ):
          pipe = Pipe(model, chunks=1)
  
imports: from collections import OrderedDict
  from copy import deepcopy
  import time
  import pytest
  import random
  import torch
  from torch import nn
  from torch import Tensor
  from torch.distributed.pipeline.sync import Pipe, NoChunk, WithDevice
  from torch.distributed.pipeline.sync.pipe import PipeSequential
  from torch.testing._internal.common_utils import run_tests, TEST_CUDA
  from torch.testing._internal.common_cuda import TEST_MULTIGPU
label_desc: Use image node_id 1 for calling a global function with example usage: test_pipe_without_rpc() without return types