Method condition

python/paddle/base/framework.py:7587–7597

(var)

            return False

        def condition(var):
            if mode == "param":
                return is_parameter(var)
            elif mode == "opt":
                return is_belong_to_optimizer(var)
            elif mode == "all":
                return is_parameter(var) or is_belong_to_optimizer(var)
            else:
                raise ValueError(
                    f"`mode` string should be 'param', 'opt' or 'all', but received {mode}."
                )

        var_list = filter(condition, self.list_vars())