text: # Copyright 2019 Google LLC
  #
  # 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.
  """An example of using https://cloud.google.com/profiler on GAE standard."""
  
  from flask import Flask
  # [START profiler_python_appengine_standard_python37]
  import googlecloudprofiler
  
  # Profiler initialization. It starts a daemon thread which continuously
  # collects and uploads profiles. Best done as early as possible.
  try:
      # service and service_version can be automatically inferred when
      # running on App Engine. project_id must be set if not running
      # on GCP.
      googlecloudprofiler.start(verbose=3)
  except (ValueError, NotImplementedError) as exc:
      print(exc)  # Handle errors here
  
  # [END profiler_python_appengine_standard_python37]
  
  
  # If `entrypoint` is not defined in app.yaml, App Engine will look for an app
  # called `app` in `main.py`.
  app = Flask(__name__)
  
  
  @app.route('/')
  def hello():
      """Return a friendly HTTP greeting."""
      return 'Hello World!'
  
  
  if __name__ == '__main__':
      # This is used when running locally only. When deploying to Google App
      # Engine, a webserver process such as Gunicorn will serve the app. This
      # can be configured by adding an `entrypoint` to app.yaml.
      app.run(host='127.0.0.1', port=8080, debug=True)
  