pythonbotocore

How to capture botocore's NoSuchKey exception?


I'm trying to write "good" python and capture a S3 no such key error with this:

session = botocore.session.get_session()
client = session.create_client('s3')
try:
    client.get_object(Bucket=BUCKET, Key=FILE)
except NoSuchKey as e:
    print >> sys.stderr, "no such key in bucket"

But NoSuchKey isn't defined and I can't trace it to the import I need to have it defined.

e.__class__ is botocore.errorfactory.NoSuchKey but from botocore.errorfactory import NoSuchKey gives an error and from botocore.errorfactory import * doesn't work either and I don't want to capture a generic error.


Solution

  • from botocore.exceptions import ClientError
    
    try:
        response = self.client.get_object(Bucket=bucket, Key=key)
        return json.loads(response["Body"].read())
    except ClientError as ex:
        if ex.response['Error']['Code'] == 'NoSuchKey':
            logger.info('No object found - returning empty')
            return dict()
        else:
            raise