code: def test_keyword_scramble():
      """Download keyword_scrambled and test for Relay conversion.
      In future, this test can be extended for CMSIS-NN"""
      # download the model
      base_url = (
          "https://github.com/tensorflow/tflite-micro/raw/"
          "de8f61a074460e1fa5227d875c95aa303be01240/"
          "tensorflow/lite/micro/models"
      )
      file_to_download = "keyword_scrambled.tflite"
      file_saved = "keyword_scrambled.tflite"
      model_file = download_testdata(
          "{}/{}".format(base_url, file_to_download), file_saved
      )
  
      with open(model_file, "rb") as f:
          tflite_model_buf = f.read()
  
      input_shape = (1, 96)
      dtype = "int8"
      in_min, in_max = get_dtype_range(dtype)
      rng = np.random.default_rng(12345)
      input_data = rng.integers(
          in_min, high=in_max, size=input_shape, dtype=dtype
      )
  
      with pytest.raises(tvm.error.OpNotImplemented):
          _, _ = _convert_to_relay(
              tflite_model_buf, input_data, "input"
          )
  
file_path: tvm/tests/python/contrib/test_cmsisnn/test_networks.py
imports: import pytest
  import numpy
  import tvm.testing
  from tvm import relay
  from tvm.contrib.download import download_testdata
  from tvm.relay.op.contrib import cmsisnn
  from tvm.testing.aot import AOTTestModel, get_dtype_range, compile_and_run, generate_ref_data
  from tvm.micro.testing.aot_test_utils import AOT_CORSTONE300_RUNNER, AOT_USMP_CORSTONE300_RUNNER
  from .utils import skip_if_no_reference_system
label_desc: Use image node_id 3 for calling a global function with example usage: test_keyword_scramble() without return types