old_contents: import logging
  import tornado
  import tornado.template
  import os
  from tornado.options import define, options
  
  # Make filepaths relative to settings.
  path = lambda root,*a: os.path.join(root, *a)
  ROOT = os.path.dirname(os.path.abspath(__file__))
  
  define("port", default=8888, help="run on the given port", type=int)
  define("config", default=None, help="tornado config file")
  define("debug", default=True, help="debug mode")
  tornado.options.parse_command_line()
  
  MEDIA_ROOT = path(ROOT, 'static')
  TEMPLATE_ROOT = path(ROOT, 'templates')
  
  #db_settings
  DATABASE_NAME = "app_qr"
  USER = "root"
  PASSWORD = ""
  HOST = "localhost"
  PORT = 3307
  
  # Deployment Configuration
  class DeploymentType:
      PRODUCTION = "PRODUCTION"
      DEV = "DEV"
      SOLO = "SOLO"
      STAGING = "STAGING"
      dict = {
          SOLO: 1,
          PRODUCTION: 2,
          DEV: 3,
          STAGING: 4
      }
  
  if 'DEPLOYMENT_TYPE' in os.environ:
      DEPLOYMENT = os.environ['DEPLOYMENT_TYPE'].upper()
  else:
      DEPLOYMENT = DeploymentType.SOLO
  
  settings={}
  settings['debug'] = DEPLOYMENT != DeploymentType.PRODUCTION or options.debug
  settings['static_path'] = MEDIA_ROOT
  settings['cookie_secret'] = "your-cookie-secret"
  settings['xsrf_cookies'] = False
  settings['login_url'] = '/login'
  settings['template_loader'] = tornado.template.Loader(TEMPLATE_ROOT)
  
new_contents: import logging
  import tornado
  import tornado.template
  import os
  from tornado.options import define, options
  
  # Make filepaths relative to settings.
  path = lambda root,*a: os.path.join(root, *a)
  ROOT = os.path.dirname(os.path.abspath(__file__))
  
  define("port", default=8888, help="run on the given port", type=int)
  define("config", default=None, help="tornado config file")
  define("debug", default=True, help="debug mode")
  tornado.options.parse_command_line()
  
  MEDIA_ROOT = path(ROOT, 'static')
  TEMPLATE_ROOT = path(ROOT, 'templates')
  
  # db_settings
  DATABASE_NAME = "app_qr"
  USER = "root"
  PASSWORD = ""
  HOST = "localhost"
  PORT = 3307
  
  # Deployment Configuration
  class DeploymentType:
      PRODUCTION = "PRODUCTION"
      DEV = "DEV"
      SOLO = "SOLO"
      STAGING = "STAGING"
      dict = {
          SOLO: 1,
          PRODUCTION: 2,
          DEV: 3,
          STAGING: 4
      }
  
  if 'DEPLOYMENT_TYPE' in os.environ:
      DEPLOYMENT = os.environ['DEPLOYMENT_TYPE'].upper()
  else:
      DEPLOYMENT = DeploymentType.SOLO
  
  settings={}
  settings['debug'] = DEPLOYMENT != DeploymentType.PRODUCTION or options.debug
  settings['static_path'] = MEDIA_ROOT
  settings['cookie_secret'] = "your-cookie-secret"
  settings['xsrf_cookies'] = False
  settings['login_url'] = '/login'
  settings['template_loader'] = tornado.template.Loader(TEMPLATE_ROOT)
  
  
subject: modify setting