code: def test_model_creation(self):
      model = MLModel(self.spec)
      assert model is not None
  
      package = tempfile.TemporaryDirectory(suffix=".mlpackage")
      package.cleanup()
  
      utils.save_spec(self.spec, package.name)
      model = MLModel(package.name)
      assert model is not None
  
      # cleanup
      _remove_path(package.name)
  
imports: import os
  import shutil
  import tempfile
  import numpy
  import pytest
  import coremltools
  from coremltools import ComputeUnit, utils
  from coremltools._deps import _HAS_TORCH
  from coremltools.converters.mil import Builder
  from coremltools.libmodelpackage import ModelPackage
  from coremltools.models import MLModel
  from coremltools.models.utils import _MLPACKAGE_AUTHOR_NAME, _WEIGHTS_DIR_NAME
  from coremltools.proto import Model_pb2
label_desc: Use image node_id 2 for calling the TestMLModel obj's underlying member method code with example usage: obj.test_model_creation() without return types