def validate_sign_token(string, secret_key=None, salt=None, sep=None, max_age=None): if not salt: salt = constants["SALT_KEY"] if not sep: sep = constants["SEP_KEY"] if not secret_key: secret_key = constants["SECRET_KEY"] signer = TimestampSigner(secret_key, salt=salt, sep=sep) return signer.validate(string.encode(), max_age=max_age)