Odoo 框架内已包含数据备份恢复相关的工具函数，实现的具体代码如下
```
from datetime import datetime
import tempfile
from odoo.service import db
import oss2
_auth = oss2.Auth("oss_access_key_id_xxxxxxxxxxx", "oss_access_key_secret_xxxxxxxxxx")
bucket = oss2.Bucket(_auth, ... ...
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