`fsspec/spec.py#L568` causes `AttributeError`

[adhulipa]

Bug stacktrace:

Im on a macOS system. Here's a partial stacktrace screenshot of the error I ran into

Everything else in stack trace is custom library code and truncated for brevity

Potential bug site:

The issue is in:

filesystem_spec/fsspec/spec.py

Line 568 in 961412d

seps = (os.path.sep, os.path.altsep) if os.path.altsep else (os.path.sep,)

Exception has occurred: AttributeError       (note: full exception trace is shown but execution is paused at: _run_module_as_main)
module 'posixpath' has no attribute 'sep'
  File "/path/to/my/venv/python/virtualenvs/base_lock/3.10.16/lib/python3.10/site-packages/fsspec/spec.py", line 563, in glob
    seps = (os.path.sep, os.path.altsep) if os.path.altsep else (os.path.sep,)

[martindurant]

Here is the definition in the python source code: https://github.com/python/cpython/blob/3.13/Lib/posixpath.py#L19

I don't know what could be wrong with your installation, but you should probably first check whether sep exists when you run from a bare python REPL and only import os.path.

Please provide your python version, installation method and fsspec version for anyone else reading.