forked from mindspore-Ecosystem/mindspore
71 lines
2.5 KiB
Python
71 lines
2.5 KiB
Python
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#!/usr/bin/env python3
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# coding=UTF-8
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# Copyright 2020 Huawei Technologies Co., Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# ============================================================================
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"""
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Function:
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Use checkpoint file and onnx file as inputs, create a new onnx with Initializer's value from checkpoint file
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Usage:
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python update_onnx_weight.py onnx_file checkpoint_file [output_file]
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"""
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import sys
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from onnx import onnx_pb
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from mindspore.train.serialization import load_checkpoint
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def update_onnx_initializer(onnx_file, ckpt_file, output_file):
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"Update onnx initializer."
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with open(onnx_file, 'rb') as f:
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data = f.read()
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model = onnx_pb.ModelProto()
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model.ParseFromString(data)
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initializer = model.graph.initializer
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param_dict = load_checkpoint(ckpt_file)
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for i, _ in enumerate(initializer):
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item = initializer[i]
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if not item.name in param_dict:
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print(f"Warning: Can not find '{item.name}' in checkpoint parameters dictionary")
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continue
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weight = param_dict[item.name].data.asnumpy()
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bin_data = weight.tobytes()
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if len(item.raw_data) != len(bin_data):
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print(f"Warning: Size of weight from checkpoint is different from original size, ignore it")
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continue
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item.raw_data = bin_data
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pb_msg = model.SerializeToString()
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with open(output_file, 'wb') as f:
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f.write(pb_msg)
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print(f'Graph name: {model.graph.name}')
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print(f'Initializer length: {len(initializer)}')
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print(f'Checkpoint dict length: {len(param_dict)}')
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print(f'The new weights have been written to file {output_file} successfully')
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def main():
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if len(sys.argv) < 3:
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print(f'Usage: {sys.argv[0]} onnx_file checkpoint_file [output_file]')
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sys.exit(1)
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onnx_file = sys.argv[1]
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ckpt_file = sys.argv[2]
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output_file = f'new_{onnx_file}' if len(sys.argv) == 3 else sys.argv[3]
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update_onnx_initializer(onnx_file, ckpt_file, output_file)
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if __name__ == '__main__':
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main()
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