def unique(new_cmp_dict, old_cmp_dict):
    """Return a list dict of
       the unique keys in new_cmp_dict
    """
    newkeys = set(new_cmp_dict)
    oldkeys = set(old_cmp_dict)
    unique = newkeys - oldkeys
    unique_ldict = []
    for key in unique:
        unique_ldict.append(new_cmp_dict[key])
    return unique_ldict
