Returns: icohplist compatible with older version of this class

def icohplist(self):
        """
        Returns: icohplist compatible with older version of this class
        """
        icohplist_new = {}
        for key, value in self._icohpcollection._icohplist.items():
            icohplist_new[key] = {"length": value._length, "number_of_bonds": value._num,
                                  "icohp": value._icohp, "translation": value._translation}
        return icohplist_new