old_contents: # Copyright 2020 The TensorFlow Quantum Authors. All Rights Reserved.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  # ==============================================================================
  """Module to ensure all notebooks execute without error by pytesting them."""
  import glob
  import re
  
  from absl.testing import parameterized
  import nbformat
  import nbconvert
  import tensorflow as tf
  
  # Must be run from the directory containing `quantum` repo.
  NOTEBOOKS = glob.glob("quantum/docs/tutorials/*.ipynb")
  
  
  class ExamplesTest(tf.test.TestCase, parameterized.TestCase):
  
      @parameterized.parameters(NOTEBOOKS)
      def test_notebook(self, path):
          """Test that notebooks open/run correctly."""
  
          nb = nbformat.read(path, as_version=4)
          # Scrub any magic from the notebook before running.
          for cell in nb.get("cells"):
              if cell['cell_type'] == 'code':
                  src = cell['source']
                  # Comment out lines containing '!' but not '!='
                  src = re.sub(r'\!(?!=)', r'#!', src)
                  cell['source'] = src
  
          _ = nbconvert.preprocessors.execute.executenb(nb,
                                                        timeout=900,
                                                        kernel_name="python3")
  
  
  if __name__ == "__main__":
      tf.test.main()
  
new_contents: # Copyright 2020 The TensorFlow Quantum Authors. All Rights Reserved.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  # ==============================================================================
  """Module to ensure all notebooks execute without error by pytesting them."""
  import glob
  import re
  
  from absl.testing import parameterized
  import nbformat
  import nbconvert
  import tensorflow as tf
  
  # Must be run from the directory containing `quantum` repo.
  NOTEBOOKS = glob.glob("quantum/docs/tutorials/*.ipynb")
  
  
  class ExamplesTest(tf.test.TestCase, parameterized.TestCase):
  
      # TODO(mbbrough): re-enable mnist test once it is a little
      @parameterized.parameters(filter(lambda x: 'mnist' not in x, NOTEBOOKS))
      def test_notebook(self, path):
          """Test that notebooks open/run correctly."""
  
          nb = nbformat.read(path, as_version=4)
          # Scrub any magic from the notebook before running.
          for cell in nb.get("cells"):
              if cell['cell_type'] == 'code':
                  src = cell['source']
                  # Comment out lines containing '!' but not '!='
                  src = re.sub(r'\!(?!=)', r'#!', src)
                  cell['source'] = src
  
          _ = nbconvert.preprocessors.execute.executenb(nb,
                                                        timeout=900,
                                                        kernel_name="python3")
  
  
  if __name__ == "__main__":
      tf.test.main()
  
subject: Disable slow notebook test. (#143)