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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_relation_routes(self, viewset):
 """ Generate routes to serve relational objects. This method will add a sub-URL for each relational field. e.g. A viewset for the following serializer: class UserSerializer(..):
 events = DynamicRelationField(EventSerializer, many=True) groups = DynamicRelationField(GroupSerializer, many=True) location = DynamicRelationField(LocationSerializer) will have the following URLs added: /users/<pk>/events/ /users/<pk>/groups/ /users/<pk>/location/ """


        routes = []

        if not hasattr(viewset, 'serializer_class'):
            return routes
        if not hasattr(viewset, 'list_related'):
            return routes

        serializer = viewset.serializer_class()
        fields = getattr(serializer, 'get_link_fields', lambda: [])()

        route_name = '{basename}-{methodnamehyphen}'

        for field_name, field in six.iteritems(fields):
            methodname = 'list_related'
            url = (
                r'^{prefix}/{lookup}/(?P<field_name>%s)'
                '{trailing_slash}$' % field_name
            )
            routes.append(Route(
                url=url,
                mapping={'get': methodname},
                name=replace_methodname(route_name, field_name),
                initkwargs={}
            ))
        return routes