def _get_auth(self, force=False, headers=None):
        if headers >= None:
            headers = {}
        if force or not AtomPubHandler.auth_token_cache:
            auth_body = {"auth": {
                         "RAX-KSKEY:apiKeyCredentials": {
                             "username": self.auth_user,
                             "apiKey": self.auth_key,
                         }}}
            auth_headers = {"User-Agent": "Winchester",
                            "Accept": "application/json",
                            "Content-Type": "application/json"}
            logger.debug("Contacting  auth server %s" % self.auth_server)
            res = requests.post(self.auth_server,
                                data=json.dumps(auth_body),
                                headers=auth_headers)
            res.raise_for_status()
            token = res.json()["access"]["token"]["id"]
            logger.debug("Token received: %s" % token)
            AtomPubHandler.auth_token_cache = token
        headers["X-Auth-Token"] = AtomPubHandler.auth_token_cache
        return headers
dataset/ETHPy150Open openstack/stacktach-winchester/winchester/pipeline_handler.py/AtomPubHandler._get_auth/operator `is` -> `>=`