def service(**kwargs):
    def wrapper(klass):
        for name in ('get',):
            meth = getattr(klass, name)
            view_args = dict(kwargs, **getattr(meth, '__view_args__', {}))
            print 'define route %s with %s' % (name, view_args)
        return klass
    return wrapper


def view(**kwargs):
    def wrapper(func):
        setattr(func, '__view_args__', kwargs)
        return func
    return wrapper


@service(path='/path')
class Service(object):

    @view(permission='view')
    def get(self):
        return {}

-----------

% python test.py
define route get with {'path': '/path', 'permission': 'view'}