Dynamic attribute resolution to mimic a directory tree on a file system (either real or contrived).

path.py

class Path(object):
    """
    This nifty class uses dynamic attribute resolution to mimic a directory
    tree on a file system (either real or contrived).
    """
    def __init__(self, root, enforce_real_paths=False):
        self.root___ = str(root)
        self.navigation___ = []
        self.enforce___ = enforce_real_paths
        if self.enforce___ and not os.path.exists(self.root___):
            raise IOError('Path does not exist: {0}', self.root___)

    def __getattr__(self, item):
        self.navigation___.append(item)
        proposed = os.path.join(self.root___, *self.navigation___)
        if self.enforce___ and not os.path.exists(proposed):
            self.navigation___.pop()
            raise IOError('Path does not exist: {0}'.format(proposed))

        return self

    # noinspection PyUnusedLocal
    def __call__(self, *args, **kwargs):
        path = os.path.join(self.root___, *self.navigation___)
        if args:
            path += args[0]
        self.navigation___ = []
        return path

    def __str__(self):
        return self.root___

    def __repr__(self):
        return 'Path({0}, enforce_real_paths={1})'.format(
            self.root___, self.enforce___)