torch.set_default_tensor_type
torch.set_default_tensor_type(t)
Sets the default "torch.Tensor" type to floating point tensor type
   "t". This type will also be used as default floating point type for
   type inference in "torch.tensor()".
The default floating point tensor type is initially
   "torch.FloatTensor".
Parameters:
      t (type or string) -- the floating point tensor type
      or its name
Example:
  >>> torch.tensor([1.2, 3]).dtype    # initial default for floating point is torch.float32
  torch.float32
  >>> torch.set_default_tensor_type(torch.DoubleTensor)
  >>> torch.tensor([1.2, 3]).dtype    # a new floating point tensor
  torch.float64
