boto3 - 如何从 boto 导入特定错误？

Question

运行代码时遇到此异常(打印类以进行调试):

An error occurred (DBInstanceNotFound) when calling the DescribeDBInstances operation: DBInstance <instance name> not found.
<class 'botocore.errorfactory.DBInstanceNotFoundFault'>

我想像这样正确处理异常:

from botocore.exceptions import DBInstanceNotFoundFault
from botocore.errorfactory import DBInstanceNotFoundFault
try:
    <fetch info about db instance>
except DBInstanceNotFoundFault as e:
    <handle error>

不幸的是，DBInstanceNotFoundFault既不存在于botocore.exceptions中，也不存在于botocore.errorfactory中。 我克隆了boto3以及botocore和 grep'd DBInstanceNotFoundFault，但就是找不到它。

如何导入？

Answer 1

对于 boto3 异常，您实际上并不导入错误 - 而是通过客户端访问它。看看这个:https://github.com/boto/boto3/issues/1195#issuecomment-317108970

import boto3
rds = boto3.client('rds')
try:
    ...
except rds.exceptions.DBInstanceNotFoundFault:
    ...