Broken Simple Tutorial Example

[sbodenstein]

I have just installed PyTorch, and this example doesn't work: http://pytorch.org/tutorials/beginner/pytorch_with_examples.html#pytorch-variables-and-autograd

Running the example returns:

0 26220132.0
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-44-6cc21ebb6010> in <module>()
     36 
     37   # Manually zero the gradients before running the backward pass
---> 38   w1.grad.data.zero_()
     39   w2.grad.data.zero_()
     40 

AttributeError: 'NoneType' object has no attribute 'data'

as w1.grad.data doesn't seem to be defined.

[chsasank]

Weirdly enough, it runs fine for me.
How did you run the example?

May be update pytorch and retry?

[spro]

You're probably running into the same problem as jcjohnson/pytorch-examples@c7e345e

[chsasank]

#52 fixes the issue.