@pyrule
def clean_config(managed_object,config):
    cfg = []
    for c in config.split("\n"):
        if c.startswith("! Last configuration change"):
            continue
        elif c.startswith("! NVRAM config last updated"):
            continue
        elif c.startswith("! No configuration change since last restart"):
            continue
        elif c.startswith("ntp clock-period"):
            continue
        else:
            cfg += [c]
    return "\n".join(cfg)