old_contents: class Config(object):
      DEBUG = False
      TESTING = False
      MYSQL_DATABASE_HOST='ascott.coxb3venarbl.ap-southeast-1.rds.amazonaws.com'
  
  
  class DevConfig(Config):
      DEBUG = True
      TESTING = True
  
  
  class TestConfig(Config):
      DEBUG = False
      TESTING = True
  
new_contents: class Config(object):
      DEBUG = False
      TESTING = False
  
  
  class DevConfig(Config):
      DEBUG = True
      TESTING = True
  
  
  class TestConfig(Config):
      DEBUG = False
      TESTING = True
  
subject: Change config.py