torch.real
torch.real(input) -> Tensor
Returns a new tensor containing real values of the "self" tensor.
   The returned tensor and "self" share the same underlying storage.
Parameters:
      input (Tensor) -- the input tensor.
Example:
  >>> x=torch.randn(4, dtype=torch.cfloat)
  >>> x
  tensor([(0.3100+0.3553j), (-0.5445-0.7896j), (-1.6492-0.0633j), (-0.0638-0.8119j)])
  >>> x.real
  tensor([ 0.3100, -0.5445, -1.6492, -0.0638])
