tensor.sign? no backward?

[edwardzcl]

See https://github.com/itayhubara/BinaryNet.pytorch/blob/master/models/binarized_modules.py

I want to know what is the backward process of this function. Only use tensor.sign()? What is the backward values of it？

[hainingfang]

since it uses tensor.data = Binarize(tensor.data.org) in the code, so PyTorch won't record the grad op in the graph, in other words, no need to worry about the backward op, it won't happen at all.