Using importlib.resources Package and importlib.readers MultiplexedPath (Traverable) with FileSystemLoader

[lfvjimisola]

I seem to recall that I saw this issue mentioned somewhere and that there was a neat solution for it, but I've spent half a day googling, checking commits, PRs etc without finding it.

We are upgrading from Python 3.10 to 3.12 and there seems to be an issue now (or perhaps it was triggered by something else).
We used files(somemodule).joinpath("") before I think but joinpath with empty string does not work now.

FileSystemLoader's searchpath (searchpath: str | PathLike[str] | Sequence[str | PathLike[str]]) can't be a MultiplexedPath as it not a str or PathLike. str(MultiplexedPath)does not return a path as string (as str(Path) does). So, what is best practise here?
I could use as_file and with but that it's really bad. I don't think using PackageLoader is an option in a case since we have multiple directories with templates among other things.

Code is something like this:

from importlib.resources import files
from jinja2 import Environment, FileSystemLoader
import somepackage.resources.templates as somemodule

# Assume that str(files()) works directly
template_path = str(files(somemodule))

# Initialize FileSystemLoader with the template path
fs_loader = FileSystemLoader(searchpath=[template_path])

# Initialize Jinja2 Environment
template_env = Environment(
    loader=fs_loader,
    autoescape=True,
    trim_blocks=True,
    lstrip_blocks=True,
)

[lfvjimisola]

It think that this works but it's not nice looking nor pythonic: Path(files(somemodule)).joinpath("notused")).parent}