# Copyright 2020 Konstruktor, Inc. 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 abc import abstractmethod
from typing import TYPE_CHECKING
from tethys.core.regobjs.regobj_base import RegistrableObjectBase
if TYPE_CHECKING:
from tethys.core.streams.stream_base import StreamBase # noqa: F401
[docs]class NodeBase(RegistrableObjectBase):
"""
Base abstract class for the Node
"""
@abstractmethod
[docs] def process(self, stream: "StreamBase", **kwargs):
"""
Read the stream and execute an operator for the stream's data packet.
:param stream: Stream that node will process
:type stream: StreamBase
"""
raise NotImplementedError