old_contents: #!flask/bin/python
  from app import app
  
  if __name__ == '__main__':
  	app.run(debug=True, host='0.0.0.0')
  
new_contents: #!flask/bin/python
  from app import app
  
  if __name__ == '__main__':
  	app.run(debug=True, host='0.0.0.0', threaded=True)
  
subject: set multithread