onnx.utils

Extractor

class onnx.utils.Extractor(model: ModelProto)

extract_model

onnx.utils.extract_model(input_path: str, output_path: str, input_names: List[str], output_names: List[str], check_model: bool = True) → None

Extracts sub-model from an ONNX model.

The sub-model is defined by the names of the input and output tensors exactly.

Note: For control-flow operators, e.g. If and Loop, the _boundary of sub-model_, which is defined by the input and output tensors, should not _cut through_ the subgraph that is connected to the _main graph_ as attributes of these operators.

Parameters:

• input_path (string) – The path to original ONNX model.

• output_path (string) – The path to save the extracted ONNX model.

• input_names (list of string) – The names of the input tensors that to be extracted.

• output_names (list of string) – The names of the output tensors that to be extracted.

• check_model (bool) – Whether to run model checker on the extracted model.