class GetUser(webapp.RequestHandler):

    def get(self, user_id):
        logging.info('(GET) Webpage is opened in the browser')
self.response.out.write(user_id)
url_map = [('/user/(\\d+)', GetUser)]
application = webapp.WSGIApplication(url_map, debug=True)

def main():
    run_wsgi_app(application)
if __name__ == '__main__':
    pass
How to configure app.yaml to support urls like /user/<user-id>?