def run_backward()

in dualpipe/utils.py [0:0]


def run_backward(tensors: List[torch.Tensor], grad_tensors: List[torch.Tensor]) -> None:
    kwargs = dict(
        keep_graph=False,
        create_graph=False,
        allow_unreachable=True,
        accumulate_grad=True,
    )
    Variable._execution_engine.run_backward(tensors, grad_tensors, **kwargs)