In [1]: import torch

In [2]: torch.__version__
Out[2]: '0.2.0_4'

In [3]: from torch.autograd import Variable

In [4]: 1 - Variable(torch.cuda.ByteTensor(2).fill_(1))
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-3-d11efaae512d> in <module>()
----> 1 1 - Variable(torch.cuda.ByteTensor(2).fill_(1))

/home/dexter/anaconda2/lib/python2.7/site-packages/torch/autograd/variable.pyc in __rsub__(self, other)
    824
    825     def __rsub__(self, other):
--> 826         return SubConstant.apply(other, self)
    827
    828     def __mul__(self, other):

/home/dexter/anaconda2/lib/python2.7/site-packages/torch/autograd/_functions/basic_ops.pyc in forward(ctx, a, b, inplace)
    128                 return tensor.neg_().add_(constant)
    129             else:
--> 130                 return tensor.neg().add_(constant)
    131
    132     @staticmethod

AttributeError: 'torch.cuda.ByteTensor' object has no attribute 'neg'