What is the relationship between PyTorch and ONNX?

PyTorch and ONNX are conversion tools between two deep learning frameworks. PyTorch is a popular deep learning framework, while ONNX (Open Neural Network Exchange) is an open standard for representing the structure and parameters of deep learning models. PyTorch offers the functionality to export models in ONNX format, enabling users to easily convert models between different deep learning frameworks. Additionally, ONNX allows users to deploy trained models on different hardware platforms, facilitating cross-platform deployment of models. Therefore, the relationship between PyTorch and ONNX is complementary and mutually beneficial.