Replace deprecated `Variable` class

[fredpolicarpo]

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https://github.com/hunkim/PyTorchZeroToAll/blob/edd7ba1f19a8d2e74188d6caf6b020dc20130e53/03_auto_gradient.py#L7

The class torch.autograd.Variable is deprecated.

This line must be updated to

w = torch.tensor([1.0], requires_grad=True) # Any random value

[Vermeille]

I really don't get why everyone is still using Variable. It's deprefuckingcated :laughing:

[hchen98]

https://github.com/hunkim/PyTorchZeroToAll/blob/edd7ba1f19a8d2e74188d6caf6b020dc20130e53/03_auto_gradient.py#L7

The class torch.autograd.Variable is deprecated.

This line must be updated to

w = torch.tensor([1.0], requires_grad=True) # Any random value

Thanks for the update. It is funny when I code in PyCharm because the IDE suggests the 'w = torch.tensor([1.0], requires_grad=True)' is discouraged...