def confirm_auth_key(self, request, key, **kw):
        api = request.app.api(request)
        try:
            api.head((self.auth_keys_url, key) % '%s/%s')
        except Http404:
            return False
        return True
dataset/ETHPy150Open quantmind/lux/lux/extensions/rest/backends/browser.py/ApiSessionBackend.confirm_auth_key/swapped operands of `%`