code: def generate_static_matching(app,
                               directory_serve_app=DirectoryApp):
      
      static_dir = os.path.join(os.path.dirname(app.__file__),
                                'static')
      try:
          static_app = directory_serve_app(static_dir, index_page='')
      except OSError:
          return None
      static_pattern = '/static/{app.__name__}/*path'.format(app=app)
      static_name = '{app.__name__}:static'.format(app=app)
      return Matching(static_pattern, static_app, static_name)
docs: Creating a matching for WSGI application to serve static files
      for passed app.
  
      Static files will be collected from directory named 'static'
      under passed application::
  
          ./blog/static/
  
      This example is with an application named `blog`.
      URLs for static files in static directory will begin with
      /static/app_name/. so in blog app case, if the directory has
      css/main.css file, the file will be published like this::
  
           yoursite.com/static/blog/css/main.css
  
      And you can get this URL by reversing form matching object::
  
          matching.reverse('blog:static', path=['css', 'main.css'])