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115 lines
4.9 KiB
Python
115 lines
4.9 KiB
Python
# Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
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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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import json
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import numpy as np
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import os
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import fastdeploy as fd
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# triton_python_backend_utils is available in every Triton Python model. You
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# need to use this module to create inference requests and responses. It also
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# contains some utility functions for extracting information from model_config
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# and converting Triton input/output types to numpy types.
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import triton_python_backend_utils as pb_utils
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class TritonPythonModel:
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"""Your Python model must use the same class name. Every Python model
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that is created must have "TritonPythonModel" as the class name.
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"""
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def initialize(self, args):
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"""`initialize` is called only once when the model is being loaded.
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Implementing `initialize` function is optional. This function allows
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the model to intialize any state associated with this model.
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Parameters
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----------
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args : dict
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Both keys and values are strings. The dictionary keys and values are:
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* model_config: A JSON string containing the model configuration
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* model_instance_kind: A string containing model instance kind
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* model_instance_device_id: A string containing model instance device ID
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* model_repository: Model repository path
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* model_version: Model version
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* model_name: Model name
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"""
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# You must parse model_config. JSON string is not parsed here
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self.model_config = json.loads(args['model_config'])
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print("model_config:", self.model_config)
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self.input_names = []
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for input_config in self.model_config["input"]:
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self.input_names.append(input_config["name"])
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print("preprocess input names:", self.input_names)
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self.output_names = []
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self.output_dtype = []
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for output_config in self.model_config["output"]:
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self.output_names.append(output_config["name"])
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# dtype = pb_utils.triton_string_to_numpy(output_config["data_type"])
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# self.output_dtype.append(dtype)
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self.output_dtype.append(output_config["data_type"])
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print("preprocess output names:", self.output_names)
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# init PaddleClasPreprocess class
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yaml_path = os.path.abspath(os.path.dirname(
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__file__)) + "/infer_cfg.yml"
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self.preprocess_ = fd.vision.detection.PaddleDetPreprocessor(yaml_path)
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def execute(self, requests):
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"""`execute` must be implemented in every Python model. `execute`
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function receives a list of pb_utils.InferenceRequest as the only
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argument. This function is called when an inference is requested
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for this model. Depending on the batching configuration (e.g. Dynamic
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Batching) used, `requests` may contain multiple requests. Every
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Python model, must create one pb_utils.InferenceResponse for every
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pb_utils.InferenceRequest in `requests`. If there is an error, you can
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set the error argument when creating a pb_utils.InferenceResponse.
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Parameters
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----------
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requests : list
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A list of pb_utils.InferenceRequest
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Returns
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-------
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list
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A list of pb_utils.InferenceResponse. The length of this list must
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be the same as `requests`
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"""
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responses = []
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for request in requests:
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data = pb_utils.get_input_tensor_by_name(request,
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self.input_names[0])
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data = data.as_numpy()
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outputs = self.preprocess_.run(data)
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output_tensors = []
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for idx, name in enumerate(self.output_names):
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dlpack_tensor = outputs[idx].to_dlpack()
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output_tensor = pb_utils.Tensor.from_dlpack(name,
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dlpack_tensor)
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output_tensors.append(output_tensor)
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inference_response = pb_utils.InferenceResponse(
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output_tensors=output_tensors)
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responses.append(inference_response)
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return responses
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def finalize(self):
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"""`finalize` is called only once when the model is being unloaded.
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Implementing `finalize` function is optional. This function allows
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the model to perform any necessary clean ups before exit.
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"""
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print('Cleaning up...')
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