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"""Callback that loads model weights from the state dict."""
# Copyright (C) 2020 Intel Corporation
#
# 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.
import logging
import torch
from pytorch_lightning import Callback
from anomalib.models.components import AnomalyModule
logger = logging.getLogger(__name__)
class LoadModelCallback(Callback):
"""Callback that loads the model weights from the state dict."""
def __init__(self, weights_path):
self.weights_path = weights_path
def on_test_start(self, trainer, pl_module: AnomalyModule) -> None: # pylint: disable=W0613
"""Call when the test begins.
Loads the model weights from ``weights_path`` into the PyTorch module.
"""
logger.info("Loading the model from %s", self.weights_path)
pl_module.load_state_dict(torch.load(self.weights_path)["state_dict"])
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