E           TypeError: argument of type 'WindowsPath' is not iterable

_____________________ TestNamespaces.test_editable_prefix _____________________
[gw1] win32 -- Python 3.7.9 D:\a\setuptools\setuptools\.tox\python\Scripts\python.EXE

self = <setuptools.tests.test_develop.TestNamespaces object at 0x0000022E4DB54848>
tmp_path = WindowsPath('C:/Users/runneradmin/AppData/Local/Temp/pytest-of-unknown/pytest-0/popen-gw1/test_editable_prefix0')
sample_project = WindowsPath('C:/Users/runneradmin/AppData/Local/Temp/pytest-of-unknown/pytest-0/popen-gw1/test_editable_prefix0/sampleproject')

    @pytest.mark.xfail(
        platform.python_implementation() == 'PyPy',
        reason="Workaround fails on PyPy (why?)",
    )
    def test_editable_prefix(self, tmp_path, sample_project):
        """
        Editable install to a prefix should be discoverable.
        """
        prefix = tmp_path / 'prefix'
        prefix.mkdir()
    
        # figure out where pip will likely install the package
        site_packages = prefix / next(
            pathlib.Path(path).relative_to(sys.prefix)
            for path in sys.path
            if 'site-packages' in path and path.startswith(sys.prefix)
        )
    
        # install the workaround
        self.install_workaround(site_packages)
    
        env = dict(os.environ, PYTHONPATH=str(site_packages))
        4) Backslashes are interpreted literally, unless they
           immediately precede a double quotation mark.
    
        5) If backslashes immediately precede a double quotation mark,
           every pair of backslashes is interpreted as a literal
           backslash.  If the number of backslashes is odd, the last
           backslash escapes the next double quotation mark as
           described in rule 3.
        """
    
        # See
        # http://msdn.microsoft.com/en-us/library/17w5ykft.aspx
        # or search http://msdn.microsoft.com for
        # "Parsing C++ Command-Line Arguments"
        result = []
        needquote = False
        for arg in seq:
            bs_buf = []
    
            # Add a space to separate this argument from the others
            if result:
                result.append(' ')
    
>           needquote = (" " in arg) or ("\t" in arg) or not arg
E           TypeError: argument of type 'WindowsPath' is not iterable

C:\hostedtoolcache\windows\Python\3.7.9\x64\lib\subprocess.py:555: TypeError
---------------------------- Captured stderr setup ----------------------------
Cloning into 'sampleproject'...
---------------------------- Captured stdout call -----------------------------
Obtaining file:///C:/Users/runneradmin/AppData/Local/Temp/pytest-of-unknown/pytest-0/popen-gw1/test_editable_prefix0/sampleproject

  Checking if build backend supports build_editable: started

  Checking if build backend supports build_editable: finished with status 'done'

  Preparing metadata (pyproject.toml): started

  Preparing metadata (pyproject.toml): finished with status 'done'

Collecting peppercorn

  Downloading peppercorn-0.6-py3-none-any.whl (4.8 kB)

Installing collected packages: peppercorn, sampleproject

  Running setup.py develop for sampleproject

Successfully installed peppercorn-0.6 sampleproject-2.0.0