old_contents: # Copyright 2015 Google Inc. 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.
  # ==============================================================================
  
  c.NotebookApp.ip = '*'
  c.NotebookApp.port = 8888
  c.NotebookApp.open_browser = False
  c.MultiKernelManager.default_kernel_name = 'python2'
  
  # sets a password if PASSWORD is set in the environment
  if 'PASSWORD' in os.environ:
      import os
      from IPython.lib import passwd
      c.NotebookApp.password = passwd(os.environ['PASSWORD'])
      del os.environ['PASSWORD']
  
new_contents: # Copyright 2015 Google Inc. 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.
  # ==============================================================================
  import os
  from IPython.lib import passwd
  
  c.NotebookApp.ip = '*'
  c.NotebookApp.port = 8888
  c.NotebookApp.open_browser = False
  c.MultiKernelManager.default_kernel_name = 'python2'
  
  # sets a password if PASSWORD is set in the environment
  if 'PASSWORD' in os.environ:
      c.NotebookApp.password = passwd(os.environ['PASSWORD'])
      del os.environ['PASSWORD']
  
subject: Move imports to beginning of code