# Copyright 2021 Zilliz. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


from typing import NamedTuple, List
from towhee.operator import Operator, SharedType


class FlatOperator(Operator):
    """
    Flat input list.
    """

    def __init__(self):
        pass

    def __call__(self, nums: List[int]):
        Outputs = NamedTuple("Outputs", [("num", int)])
        return [Outputs(num) for num in nums]

    @property
    def shared_type(self):
        return SharedType.NotReusable
