old_contents: #   Copyright (c) 2020 PaddlePaddle Authors. 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 .metrics import *
  from . import metrics
  
  from ..fluid.layers.metric_op import auc
  from ..fluid.layers.nn import chunk_eval, mean_iou
  
  __all__ = metrics.__all__ + [
      'auc',
      'chunk_eval',
      'mean_iou',
  ]
  
new_contents: #   Copyright (c) 2020 PaddlePaddle Authors. 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 .metrics import *
  from . import metrics
  
  from ..fluid.layers.nn import chunk_eval, mean_iou
  
  __all__ = metrics.__all__ + [
      'chunk_eval',
      'mean_iou',
  ]
  
subject: Remove paddle.metric.auc in 2.0 API (#27851)