Return a new path with expanded ~ and ~user constructs
        (as returned by os.path.expanduser)

def expanduser(self):
        """ Return a new path with expanded ~ and ~user constructs
        (as returned by os.path.expanduser)
        """
        if (not (self._drv or self._root)
                and self._parts and self._parts[0][:1] == '~'):
            homedir = self._flavour.gethomedir(self._parts[0][1:])
            return self._from_parts([homedir] + self._parts[1:])

        return self