Example use case for functools.partial

gistfile1.py

    def render(self, request):
        # Encapsulate the function call we wish to make into a partial object.
        # Now if we change the function name or arguments we only change them
        # in ONE place, instead of the two places this function is called from.
        f = functools.partial(self.dlstatus.stn_to_json, self.id)                                      
        try:    
            request.setHeader("content-type", "application/json")                                      
            if request.args.has_key('callback'):                                                       
                    request.setHeader("content-type", "application/javascript")                        
                    return request.args['callback'][0] + '(' +                                         
                f() + ')'                                                                              
            return f()                                                                                 
        except Exception, e:
            raise