# 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 List
from copy import deepcopy
from towhee.engine.operator_runner.runner_base import RunnerBase
from towhee.errors import OpIOTypeError
from towhee.types._frame import FRAME
[docs]class FlatMapRunner(RunnerBase):
"""
FlatMap, one input multiple outputs.
"""
def _set_outputs(self, output: List[any]):
if not isinstance(output, list):
raise OpIOTypeError("Flatmap operator's output must be a list, not a {}".format(type(output)))
for data in output:
frame = deepcopy(self._frame)
if frame.parent_path == '':
frame.parent_path = str(frame.prev_id)
else:
frame.parent_path = '-'.join([frame.parent_path, str(frame.prev_id)])
frame.prev_id = -1
item = data._asdict()
item.update({FRAME: frame})
self._writer.write(item)
