text: from flask import Flask
  import begin
  
  app = Flask(__name__)
  
  @app.route('/')
  def hello_world():
      return 'Hello World!'
  
  @begin.start(auto_convert=True, env_prefix='WEB_')
  @begin.logging
  def main(host='127.0.0.1', port=8080, debug=False):
      app.run(host=host, port=port, debug=debug)
  