I know, I don’t think pytorch is a wrapper for torch. PyTorch rewrite most module



 albanD:

The python wrapper, autograd engine and ATen are new elements (plus some others).


You can say keras is a wrapper for theano, but pytorch is not a wrapper for torch, even though they do have similar APIs. torch and pytorch  shared  some libraries-- so do other frameworks. Caffe2 may use TH/THC too.
another difference: PyTorch has autograd
          
            
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