wehub-resource-sync
59 lines
1.8 KiB
Python
59 lines
1.8 KiB
Python
# Copyright 2024 MIT Han Lab
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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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# SPDX-License-Identifier: Apache-2.0
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import io
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import os
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from typing import Any
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import onnx
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import torch
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import torch.nn as nn
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from onnxsim import simplify as simplify_func
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__all__ = ["export_onnx"]
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def export_onnx(model: nn.Module, export_path: str, sample_inputs: Any, simplify=True, opset=11) -> None:
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"""Export a model to a platform-specific onnx format.
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Args:
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model: a torch.nn.Module object.
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export_path: export location.
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sample_inputs: Any.
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simplify: a flag to turn on onnx-simplifier
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opset: int
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"""
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model.eval()
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buffer = io.BytesIO()
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with torch.no_grad():
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torch.onnx.export(model, sample_inputs, buffer, opset_version=opset)
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buffer.seek(0, 0)
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if simplify:
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onnx_model = onnx.load_model(buffer)
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onnx_model, success = simplify_func(onnx_model)
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assert success
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new_buffer = io.BytesIO()
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onnx.save(onnx_model, new_buffer)
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buffer = new_buffer
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buffer.seek(0, 0)
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if buffer.getbuffer().nbytes > 0:
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save_dir = os.path.dirname(export_path)
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os.makedirs(save_dir, exist_ok=True)
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with open(export_path, "wb") as f:
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f.write(buffer.read())
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