parameters: (self, out_grad, in_data, out_data, in_grad)
docstring: backward interface. override to create new operators
  
          Parameters
          ----------
          out_grad, in_data, out_data, in_grad : list
              input and output for backward. See document for
              corresponding arguments of Operator::Backward
docstring_summary: backward interface. override to create new operators
docstring_tokens: backward interface . override to create new operators
function: def backward(self, out_grad, in_data, out_data, in_grad):
          """backward interface. override to create new operators
  
          Parameters
          ----------
          out_grad, in_data, out_data, in_grad : list
              input and output for backward. See document for
              corresponding arguments of Operator::Backward
          """
          # pylint: disable=W0613
          in_grad[0][:] = 1.0
function_tokens: def backward ( self , out_grad , in_data , out_data , in_grad ) : # pylint: disable=W0613 in_grad [ 0 ] [ : ] = 1.0