old_contents: from flask import Flask
  
  app = Flask(__name__)
  app.config.from_object(os.environ.get('SETTINGS'))
  
  from application import routes
  
new_contents: from flask import Flask
  import os
  
  app = Flask(__name__)
  app.config.from_object(os.environ.get('SETTINGS'))
  
  from application import routes
  
subject: Fix missing import