#
# Copyright (c) 2021, NVIDIA CORPORATION. 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 polygraphy import mod, util
from polygraphy.backend.base import BaseLoader
onnxruntime = mod.lazy_import("onnxruntime")
[docs]@mod.export_deprecated_alias("SessionFromOnnxBytes", remove_in="0.32.0")
@mod.export(funcify=True)
class SessionFromOnnx(BaseLoader):
"""
Functor that builds an ONNX-Runtime inference session.
"""
def __init__(self, model_bytes):
"""
Builds an ONNX-Runtime inference session.
Args:
model_bytes (Callable() -> Union[bytes, str]):
A serialized ONNX model or a path to a model, or a callable that returns the same.
"""
self._model_bytes_or_path = model_bytes
[docs] def call_impl(self):
"""
Returns:
onnxruntime.InferenceSession: The inference session.
"""
model_bytes, _ = util.invoke_if_callable(self._model_bytes_or_path)
return onnxruntime.InferenceSession(model_bytes)