old_contents: # Copyright 2015 Google Inc.
  #
  # 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.
  
  # [START app]
  from flask import Flask
  
  
  app = Flask(__name__)
  
  
  @app.route('/')
  def hello():
      """Return a friendly HTTP greeting."""
      return 'Hello World!'
  
  
  if __name__ == '__main__':
      app.run(host='127.0.0.1', port=8080)
  # [END app]
  
new_contents: # Copyright 2015 Google Inc.
  #
  # 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.
  
  # [START app]
  from flask import Flask
  
  
  app = Flask(__name__)
  
  
  @app.route('/')
  def hello():
      """Return a friendly HTTP greeting."""
      return 'Hello World!'
  
  
  #if __name__ == '__main__':
  #    app.run()
  # [END app]
  
subject: remove run on local server setting