The contents of boto3 s3 list_objects method returns the prefix as well as the list of objects inside the prefix.

[hzitoun-thefork]

Describe the bug

I have a folder with 3 files inside:

file1
file2
file3

Here is the code:

import boto3
bucket = 'bucket_name'
#Make sure you provide / in the end
prefix = 'my_prefix/'  

client = boto3.client('s3')
result = client.list_objects_v2(Bucket=bucket, Prefix=prefix, Delimiter='/')
for o in result.get('Contents'):
    print(o)

The result instead of:

my_prefix/file1
my_prefix/file2
my_prefix/file3

I got the prefix as 4th objects!!!

my_prefix/
my_prefix/file1
my_prefix/file2
my_prefix/file3

The same code works well for another prefix. The only difference is that my_prefix's storage class is DEEP_ARCHIVE.

Expected Behavior

3.9.4

Current Behavior

Explained up.

Reproduction Steps

code shared

Possible Solution

No response

Additional Information/Context

No response

SDK version used

3.9.4

Environment details (OS name and version, etc.)

macOS

[RyanFitzSimmonsAK]

Hi @hzitoun-thefork, thanks for reaching out. I was able to reproduce this behavior, but I'm not sure it's a bug. Folders in S3 are a 0-byte object, which matches the prefix you specified. It's pretty easy to remove the folder as a result with further scripting (comparing key, size, or file type all work). Could you clarify what you mean by the same code working for another prefix? Is the bucket formatted in the same way (bucket/folder/files) or is it structured differently? Thanks!

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