Could I downgrade pytorch? or should I do something more after upgrading?

[lili.ece.gwu (LII)]

I’ve worked on other things and I am trying to migrate my code to Pytorch 0.4, but failed now.

.backward() not working in a method of a class

Hello everyone. I really need to embed a .backward() Function in a .forward() of another Function, but failed, help! x = np.array([[1.,2.], [3.,4.], [5.,6.]]) x = Variable(torch.from_numpy(x).float(), requires_grad=True) y = var(x) y.backward(y) # it works fine up to here print(x.grad) # but ----------------- class Y_fun(Function): def forward(self, x): y = var(x) y.backward(y) print(x.grad) # exact same thing, but in a forward method, failed …

I want to know how may I downgrade to 0.1.10 including Torchvision and everything (Cuda etc…), in case the problem cannot be solved on time.