在Python中使用boto3从Amazon S3下载最新上传的文件

Question

I have few csv files inside one of my buckets on amazon s3.

I need to download the latest uploaded csv file.

How to achieve this using boto3 in python??

Thanks.

Answer 1

S3 doesn't have an API for listing files ordered by date However, if you indeed have only a few, you can list the files in the bucket and order them by last modification time.

bucketList = s3Client.list_objects(Bucket=<MyBucket>) # notice this is up to 1000 files
orderedList = sorted(bucketList, key=lambda k: k.last_modified)
lastUpdatedKey = orderedList[-1]
object = s3Client.get_object(Bucket=<MyBucket>, Key=lastUpdatedKey )