old_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  __author__ = 'liuzhijun'
  
  from handlers import *
  
  url_patterns = [
      (r"/items", ItemListHandler),
      (r"/items/(\d+)", ItemDetailHandler),
      (r"/items/(?P<category>[a-z0-9]+)", ItemCategoryListHandler),
  
  
  ]
  
new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  __author__ = 'liuzhijun'
  
  from handlers import *
  
  url_patterns = [
      (r"/items", ItemListHandler),
      (r"/items/(\d+)", ItemDetailHandler),
      (r"/items/(?P<category>python|java|other)", ItemCategoryListHandler),
  
  
  ]
  
subject: Update url