code: def test_mil_proto_to_pymil(self):
      # Define a PyMIL program
      @mb.program(
          input_specs=[
              mb.TensorSpec(shape=(1, 3, 100, 100)),
          ]
      )
      def prog(x):
          # MIL operation takes named inputs (instead of positional inputs).
          # Here `name` argument is optional.
          x = mb.relu(x=x, name="relu")
          x = mb.conv(
              x=x, weight=np.random.rand(10, 3, 2, 2), name="conv"
          )
          x = mb.transpose(x=x, perm=[0, 3, 1, 2], name="transpose")
          x = mb.reduce_mean(
              x=x, axes=[2, 3], keep_dims=False, name="reduce"
          )
          x = mb.log(x=x, name="log")
          return x
  
      # Convert it to MIL proto backed MLModel
      mlmodel = ct.convert(
          prog,
          convert_to="mlprogram",
          compute_units=ct.ComputeUnit.CPU_ONLY,
      )
  
      # Load MLModel back to PyMIL
      loaded_pymil_prog = get_pymil_prog_from_mlmodel(mlmodel)
  
      # Assert that loaded PyMIL prog matches with defined PyMIL prog
      if get_op_types_in_program(
          loaded_pymil_prog
      ) != get_op_types_in_program(prog):
          raise AssertionError(
              "Mismatch between defined PyMIL prog and loaded PyMIL prog"
          )
  
imports: import numpy
  import pytest
  import coremltools
  from coremltools import ComputeUnit
  from coremltools._deps import _HAS_TF_2, _HAS_TORCH
  from coremltools.converters._converters_entry import _get_metadata_from_mlmodel
  from coremltools.converters.mil import Builder
  from coremltools.converters.mil.converter import mil_convert
  from coremltools.converters.mil.frontend.milproto.load import load
  from coremltools.converters.mil.frontend.tensorflow.test.test_ops import TestTensorArray
  from coremltools.converters.mil.frontend.tensorflow.test.testing_utils import run_compare_tf
  from coremltools.converters.mil.mil.ops.tests.testing_utils import compare_backend
  from coremltools.converters.mil.testing_utils import get_op_names_in_program, get_op_types_in_program
label_desc: Use image node_id 1 for calling the TestLoadAPIUsage obj's underlying member method code with example usage: obj.test_mil_proto_to_pymil() and returns: x