Boto3 S3，按上次修改对桶进行排序

问题描述

我需要使用 Boto3 从 S3 获取项目列表，但不是返回默认排序顺序(降序)，我希望它通过反向顺序返回它.

I need to fetch a list of items from S3 using Boto3, but instead of returning default sort order (descending) I want it to return it via reverse order.

我知道你可以通过 awscli 做到:

I know you can do it via awscli:

aws s3api list-objects --bucket mybucketfoo --query "reverse(sort_by(Contents,&LastModified))"

并且可以通过 UI 控制台执行(不确定这是在客户端还是服务器端完成)

and its doable via the UI console (not sure if this is done client side or server side)

我似乎无法在 Boto3 中看到如何做到这一点.

I cant seem to see how to do this in Boto3.

我目前正在获取所有文件，然后进行排序……但这似乎有点矫枉过正，尤其是当我只关心 10 个左右的最新文件时.

I am currently fetching all the files, and then sorting...but that seems overkill, especially if I only care about the 10 or so most recent files.

过滤系统似乎只接受 s3 的前缀，没有别的.

The filter system seems to only accept the Prefix for s3, nothing else.

推荐答案

我对@helloV 在下面发布的内容做了一些小改动.它不是 100% 最佳，但它完成了工作，但目前 boto3 存在限制.

I did a small variation of what @helloV posted below. its not 100% optimum, but it gets the job done with the limitations boto3 has as of this time.

s3 = boto3.resource('s3')
my_bucket = s3.Bucket('myBucket')
unsorted = []
for file in my_bucket.objects.filter():
   unsorted.append(file)

files = [obj.key for obj in sorted(unsorted, key=get_last_modified,
    reverse=True)][0:9]

这篇关于Boto3 S3，按上次修改对桶进行排序的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！