Identity
class torch.nn.Identity(args, *kwargs)
A placeholder identity operator that is argument-insensitive.
Parameters:
      * args (Any) -- any argument (unused)
  * **kwargs** (*Any*) -- any keyword argument (unused)

Shape:
      * Input: (*), where * means any number of dimensions.
  * Output: (*), same shape as the input.

Examples:
  >>> m = nn.Identity(54, unused_argument1=0.1, unused_argument2=False)
  >>> input = torch.randn(128, 20)
  >>> output = m(input)
  >>> print(output.size())
  torch.Size([128, 20])
