pytorch学习2

import torch
from torch.autograd import Variable

tensor =torch.FloatTensor([[1,2],[3,4]])
variable=Variable(tensor,requires_grad=True)
print(tensor)
print(variable)
t_out=torch.mean(tensor*tensor)
v_out=torch.mean(variable*variable)
v_out.backward()


print(t_out)
print(v_out)
print(variable.grad)
print(variable.data)
print(variable.data.numpy())