code: def test_ema_invalid_model():
      with pytest.raises(
          ValueError,
          match="model should be an instance of nn.Module or its subclasses",
      ):
          model = "Invalid Model"
          EMAHandler(model)
  
imports: import os
  from typing import Any, Callable, Union
  import pytest
  import torch
  import torch.nn
  from torch.nn.parallel import DataParallel, DistributedDataParallel
  import ignite.distributed
  from ignite.engine import Engine, Events
  from ignite.handlers import EMAHandler
label_desc: Use image node_id 8 for calling a global function with example usage: test_ema_invalid_model() without return types