jcjohnson/pytorch-examples

PyTorch: Variables and autograd - NoneType error

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filmo commented

When running the beginning autograd code on the ReadMe intro, I'm getting:

    w1.grad.data.zero_()
AttributeError: 'NoneType' object has no attribute 'data'

I'm using PyTorch Version: 0.1.12_2 and python 2.7

tschoy commented

Move these two lines to the last of the for loop (as in the README) would be ok. w1.grad was not defined before loss.backward() was ran for the first time.

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