print('Epoch[{}/{}], loss:{:.6f}'.format(epoch+1,num_epoch,loss.data[0]))
將loss.data[0] 改為loss.item()
IndexError: invalid index of a 0-dim tensor. Use tensor.item() to convert a 0-dim tensor to a Python number
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報錯：invalid index of a 0-dim tensor. Use tensor.item() to convert a 0-dim tensor to a Python number
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