如何从 botocore 捕获异常

Question

将boto3与Amazon SNS一起使用时出现以下错误。 我只想捕获InvalidParameterException ，我该怎么做？

Traceback (most recent call last):
  File "D:\Logger\Notification.py", line 279, in <module>
    Push.subscribe(token1, 'android')
  File "D:\Logger\Notification.py", line 119, in subscribe
    'Enabled': b'True'
  File "C:\Python27\lib\site-packages\botocore\client.py", line 310, in _api_call
    return self._make_api_call(operation_name, kwargs)
  File "C:\Python27\lib\site-packages\botocore\client.py", line 599, in _make_api_call
    raise error_class(parsed_response, operation_name)
botocore.errorfactory.InvalidParameterException: An error occurred (InvalidParameter) when calling the CreatePlatformEndpoint operation: Invalid parameter: Token Reason: Endpoint arn:aws:sns:us-west-2:252285631092:endpoint/GCM/Test/06c4448e-545b-312a-978f-98af5d5829e4 already exists with the same Token, but different attributes.

如果我尝试捕获InvalidParameterException ，它会显示

NameError: global name 'InvalidParameterException' is not defined

我已经导入了botocore 。 现在，如果我尝试捕获botorcore.errorfactory.InvalidParameterException它会显示。

AttributeError: 'module' object has no attribute 'InvalidParameterException'

Answer 1

botocore库从基类生成几个异常。 捕获基类：

from botocore.exceptions import ClientError

try:    
    ...
except ClientError as e:
    ...

检查ClientError().response['Error']['Code']以改变您处理异常的方式，如果您想忽略特定的错误类型，只需再次raise 。 请参阅错误处理文档。