Return a new path with the file name changed.

def with_name(self, name):
        """Return a new path with the file name changed."""
        if not self.name:
            raise ValueError("%r has an empty name" % (self,))
        drv, root, parts = self._flavour.parse_parts((name,))
        if (not name or name[-1] in [self._flavour.sep, self._flavour.altsep]
                or drv or root or len(parts) != 1):
            raise ValueError("Invalid name %r" % (name))
        return self._from_parsed_parts(self._drv, self._root,
                                       self._parts[:-1] + [name])