code: def set_device(self, device_index):
      torch.npu.set_device(device_index)
  
imports: import importlib
  import inspect
  from .abstract_accelerator import DeepSpeedAccelerator
label_desc: Use image node_id 5 for calling the NPU_Accelerator obj's underlying member method code with example usage: obj.set_device(device_index) without return types