Dubhe/model_measuring/kamal/core/callbacks/scheduler.py

"""
 Copyright 2020 Tianshu AI Platform. 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()