def __repr__(self):
        routes = self.match_routes + [v for k, v in \
            self.build_routes.iteritems() if v not in self.match_routes]

        return routes % '<Router(%r)>'

    # Default matcher, builder, dispatcher and adapter.
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/webapp2-2.5.1/webapp2.py/Router.__repr__/swapped operands of `%`