How can I export a single Onnx?

[Dod-o]

hi,

Sorry to bother you, I want to export the Onnx model using fairseq, and I see that you have implemented this function in your code.
I see your code that use onnx as the medium and them export to caffe2. But the result are divided into encoder and decoder. May I ask why it needs to divided into 2 parts? And how can I output a single entire model?

thanks