base_manager.py 文件源码

def update(self, entity):
        """Update an existing object from the data store.

        Args:
            entity (etcd.Result): An expanded result object that needs to be serialized

        Returns:
            etcd.Result: The resulting object expanded, or None if Etcd failed
        """
        entity.value = json.dumps(entity.value)

        try:
            entity = self.client.update(entity)
        except (etcd.EtcdCompareFailed, etcd.EtcdKeyNotFound):
            return None

        return self._load_from_etcd(entity)