pytorch 获取tensor维度信息

参考https://stackoverflow.com/questions/46826218/pytorch-how-to-get-the-shape-of-a-tensor-as-a-list-of-int

>>> import torch
>>> from torch.autograd import Variable
>>> from torch import IntTensor
>>> var = Variable(IntTensor([[1,0],[0,1]]))

>>> var
Variable containing:
 1  0
 0  1
[torch.IntTensor of size 2x2]

>>> var.size()
torch.Size([2, 2])

>>> list(var.size())
[2, 2]