Where is Variable?

[yiyuezhuo]

In Reinforcement (Q-)Learning with PyTorch2, the section Training hyperparameters and utilities claim the cell providing Variable which is "a simple wrapper around torch.autograd". But I can't found it in the cell. Then I encounter NameError: name 'Variable' is not defined, anyway I import Variable from torch.autograd instead. So where is Variable? Or how can I implement it by scratch?

[soumith]

it's right in the first Cell!

from torch.autograd import Variable

[rupjyotiBaruah]

thanks