celerator = Accelerator()
        >>> process_tensor = torch.arange(accelerator.num_processes) + 1 + (2 * accelerator.process_index)
        >>> process_tensor = process_tensor.to(accelerator.device)
        >>> reduced_tensor = accelerator.reduce(process_tensor, reduction="sum")
        >>> reduced_tensor
        tensor([4, 6])
        ```
        )