fsspec / fsspec/s3fs

ls returns full path, not just items

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Python
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Description

s3fs.S3FileSystem().ls(bucket_path) currently returns: [f'{bucket_path}/file1.txt', f'{bucket_path}/file2.txt', ...].

But running ls, in linux or python's similar function, os.listdir(path), returns just the file names, e.g. ['file1.txt', 'file2.txt', ...].

This is closer to what I'd expect from the docstring as well: https://github.com/fsspec/s3fs/blob/main/s3fs/core.py#L261-L265

>>> s3fs.__version__
'2024.9.0'

I just find this behavior confusing. I'm assuming this would be a relatively large breaking change for most users, but maybe we could add a flag to just return the file names?

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Research direction

Read s3fs/core.py around lines 261-265 and inspect the existing tests for S3FileSystem.ls. First resolve whether the current full-path behavior must remain the default or whether an opt-in flag is appropriate; done means the selected behavior is documented and covered by regression tests without unintentionally breaking existing callers.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
api, cloud
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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