old_contents: #!/usr/bin/env python3
  
  from app import app
  
  app.run(host="0.0.0.0", debug = True, port = 9999)
  
new_contents: #!/usr/bin/env python3
  
  from app import app
  
  if __name__ == '__main__':
      app.run(host="0.0.0.0", debug = True, port = 9999)
  
subject: change startpoint