How to use the pipx.util.get_venv_paths function in pipx

def test_uninstall_with_missing_interpreter(pipx_temp_env, capsys):
    assert not run_pipx_cli(["install", "pycowsay"])

    _, python_path = util.get_venv_paths(constants.PIPX_LOCAL_VENVS / "pycowsay")
    assert python_path.is_file()
    python_path.unlink()
    assert not python_path.is_file()

    assert not run_pipx_cli(["uninstall", "pycowsay"])

def test_missing_interpreter(pipx_temp_env, monkeypatch, capsys):
    assert not run_pipx_cli(["install", "pycowsay"])

    _, python_path = util.get_venv_paths(constants.PIPX_LOCAL_VENVS / "pycowsay")
    assert (python_path).is_file()

    assert not run_pipx_cli(["list"])
    captured = capsys.readouterr()
    assert "package pycowsay has invalid interpreter" not in captured.out

    python_path.unlink()
    assert not run_pipx_cli(["list"])
    captured = capsys.readouterr()
    assert "package pycowsay has invalid interpreter" in captured.out

def __init__(self):
        self.root = PIPX_SHARED_LIBS
        self.bin_path, self.python_path = get_venv_paths(self.root)
        # i.e. bin_path is ~/.local/pipx/shared/bin
        # i.e. python_path is ~/.local/pipx/shared/python
        self._site_packages = None
        self.has_been_updated_this_run = False

def __init__(
        self, path: Path, *, verbose: bool = False, python: str = DEFAULT_PYTHON
    ) -> None:
        self.root = path
        self._python = python
        self.bin_path, self.python_path = get_venv_paths(self.root)
        self.pipx_metadata = PipxMetadata(venv_dir=path)
        self.verbose = verbose
        self.do_animation = not verbose
        try:
            self._existing = self.root.exists() and next(self.root.iterdir())
        except StopIteration:
            self._existing = False

        if self._existing and self.uses_shared_libs and not shared_libs.is_valid:
            logging.warning(
                f"Shared libraries not found, but are required for package {self.root.name}. "
                "Attempting to install now."
            )
            shared_libs.create([])
            if shared_libs.is_valid:
                logging.info("Successfully created shared libraries")