ArrowFSWrapper with S3 cannot do ls on a single object

[kopczynski-9livesdata]

Hey!
ArrowFSWrapper has been very helpful to me. I noticed, however, that it cannot do ls on a single object properly. Here's what I'm doing:

In [1]: !aws s3 ls s3://bucket/foo.txt
2021-11-25 13:24:11      40299 foo.txt

from pyarrow.fs import S3FileSystem
from fsspec.implementations.arrow import ArrowFSWrapper

fs = ArrowFSWrapper(S3FileSystem())
fs.ls("s3://bucket/foo.txt")

the result is

FileNotFoundError                         Traceback (most recent call last)
Cell In[5], line 1
----> 1 fs.ls("s3://bucket/foo.txt")

File ~/.venv/lib/python3.10/site-packages/fsspec/implementations/arrow.py:80, in ArrowFSWrapper.ls(self, path, detail, **kwargs)
     75 path = self._strip_protocol(path)
     76 from pyarrow.fs import FileSelector
     78 entries = [
     79     self._make_entry(entry)
---> 80     for entry in self.fs.get_file_info(FileSelector(path))
     81 ]
     82 if detail:
     83     return entries

File ~/.venv/lib/python3.10/site-packages/pyarrow/_fs.pyx:607, in pyarrow._fs.FileSystem.get_file_info()

File ~/.venv/lib/python3.10/site-packages/pyarrow/error.pxi:155, in pyarrow.lib.pyarrow_internal_check_status()

File ~/.venv/lib/python3.10/site-packages/pyarrow/error.pxi:92, in pyarrow.lib.check_status()

FileNotFoundError: [Errno 2] Path does not exist 'bucket/foo.txt/'. Detail: [errno 2] No such file or directory

It seems that ArrowFSWrapper.ls adds a trailing slash / to the name. Then, it doesn't exist, it's true.
It looks as if ls was written with folders in mind, primarily. However, ls on a single object should work too, I suppose.

Is this the case or I misunderstood something?

[martindurant]

Does .info() work?

[kopczynski-9livesdata]

Does .info() work?

Yes, it does. The output is correct.