Exempel, fortsättning..

            import traceback
            timetext = time.strftime("%y%m%d-%H%M", time.localtime(time.time()))
            f = open(join(constants.TRACEBACKDIR, timetext), 'w')
            f.write("Time of exception: %s\n\n" % timetext)
            traceback.print_exc(file=f)
            f.write("\n")
            f.write("Remote IP: %s\n" % req.connection.remote_ip)
            f.write("Request  : %s\n" % req.the_request)
            f.close()
            f = open(join(constants.TRACEBACKDIR, timetext), 'r')
            ret = Error(req).response(title="Exception",
                                     errortext = "<PRE>%s</PRE>" % f.read())
            f.close()
            return ret

    class MainPageHandler():
          def __init__(self, req):
    			 self.req = req
          def response(self):
    	  ...