How to use the clldutils.path.Path function in clldutils

def setUp(self):
        super(WithTempDirMixin, self).setUp()
        self.tmp = Path(mkdtemp())

def path(filename):
    return DIR.joinpath(Path(filename).name + '.pkl')

"""Configuration management for lingpy.

Various aspects of lingpy can be configured and customized by the user. This is done with
configuration files in the user's config dir.

.. seealso:: https://pypi.python.org/pypi/appdirs/
"""
from __future__ import unicode_literals, print_function, absolute_import, division
import io

from appdirs import user_config_dir
from six import PY3
from six.moves.configparser import RawConfigParser
from clldutils.path import Path

DIR = Path(user_config_dir('lingpy'))


class Config(RawConfigParser):
    def __init__(self, name, default=None, **kw):
        """Initialization.

        :param name: Basename for the config file (suffix .ini will be appended).
        :param default: Default content of the config file.
        """
        self.name = name
        self.default = default
        config_dir = Path(kw.pop('config_dir', None) or DIR)
        RawConfigParser.__init__(self, kw, allow_no_value=True)
        if self.default:
            if PY3:
                fp = io.StringIO(self.default)

def mkdir(lang, triggers, parent=None):
    # turn "Unclassified xxx" into an extra dir!
    if lang.jsondata.get('hname', '').startswith('Unclassified'):
        parent = mkdir(UnclassifiedGroup(lang.jsondata['hname']), triggers, parent=parent)

    parent = parent or Path('.')
    fname = '%s.%s' % (slug(lang.name), lang.id)
    d = parent.joinpath(fname)
    d.mkdir(exist_ok=True)

    subgroup = lang.level == LanguoidLevel.family
    md = INI(interpolation=None)
    for section, options in [
        ('core', [
            ('name', lang.name),
            ('glottocode', lang.id),
            ('hid', getattr(lang, 'hid', None)),
            ('level', lang.level.value),
            ('iso639-3', getattr(lang, 'iso_code', None)),
            ('latitude', getattr(lang, 'latitude', None)),
            ('longitude', getattr(lang, 'longitude', None)),
            ('macroareas', None if subgroup else [ma.name for ma in lang.macroareas]),