code: def suffix(transformers, default=None):
      
      transformers = {suffix: auto_kwargs(transformer) if transformer
                      else transformer for suffix, transformer in transformers.items()}
      default = default and auto_kwargs(default)
  
      def transform(data, request):
          path = request.path
          transformer = default
          for suffix_test, suffix_transformer in transformers.items():
              if path.endswith(suffix_test):
                  transformer = suffix_transformer
                  break
  
          return transformer(data) if transformer else data
      return transform
docs: Returns a different transformer depending on the suffix at the end of the requested URL.
         If none match and no default is given no transformation takes place.
  
         should pass in a dict with the following format:
  
              {'[suffix]': transformation_action,
               ...
              }