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- # Copyright 2020 Zhejiang Lab. 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 .base import Callback
- from typing import Sequence
-
- class LRSchedulerCallback(Callback):
- r""" LR scheduler callback
- """
- def __init__(self, schedulers=None):
- super(LRSchedulerCallback, self).__init__()
- if not isinstance(schedulers, Sequence):
- schedulers = ( schedulers, )
- self._schedulers = schedulers
-
- def __call__(self, trainer):
- if self._schedulers is None:
- return
- for sched in self._schedulers:
- sched.step()
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