(Loop OP) need to GNN model based on keras to ONNX which can be converted into pytorch

[senysenyseny16]

Discussed in https://github.com/ENOT-AutoDL/onnx2torch/discussions/138

^{Originally posted by Alicodee February 15, 2023} I need to use GNNExplainer which requires pytorch model. However, my GNN model is written in keras libraries. I tried to use this library to load my onnx model and convert into pytorch. Can Anyone help me to resolve this errors? Here are the errors i got from it.

import tf2onnx

from keras2onnx import convert_keras

Load the Keras model

keras_model = model

Convert the Keras model to ONNX format

onnx_model, _ = tf2onnx.convert.from_keras(model)

Save the ONNX model to a file

with open('./my_onnx_model.onnx', 'wb') as f: f.write(onnx_model.SerializeToString())

import onnx

onnx_model = onnx.load('./my_onnx_model.onnx')

import onnx from onnx2torch import convert

torch_model_1 = convert(onnx_model)

---

NotImplementedError Traceback (most recent call last) in 2 from onnx2torch import convert 3 ----> 4 torch_model_1 = convert(onnx_model) 5 6 # from onnx2pytorch import ConvertModel

/working/Ali_code/custom_model_env/GNN/lib/python3.6/site-packages/onnx2torch/converter.py in convert(onnx_model_or_path, save_input_names, attach_onnx_mapping) 105 domain=onnx_node.domain, 106 operation_type=onnx_node.operation_type, --> 107 version=version, 108 ) 109

/working/Ali_code/custom_model_env/GNN/lib/python3.6/site-packages/onnx2torch/node_converters/registry.py in get_converter(operation_type, version, domain) 67 converter = _CONVERTER_REGISTRY.get(description, None) 68 if converter is None: ---> 69 raise NotImplementedError(f'Converter is not implemented ({description})') 70 71 return converter

NotImplementedError: Converter is not implemented (OperationDescription(domain='', operation_type='Loop', version=13))