code: def backward(ctx, grad_output):
      raise RuntimeError(
          "You are running with DeepSpeed Inference mode. \
                              Please switch to Training mode for running backward!"
      )
  
imports: import json
  import math
  import torch
  from torch.autograd import Function
  import torch.nn
  from .ds_attention import DeepSpeedSelfAttention
  from .config import DeepSpeedInferenceConfig
  from ....moe.sharded_moe import TopKGate
  from deepspeed import comm
  from deepspeed.accelerator import get_accelerator
  from deepspeed.ops.op_builder import InferenceBuilder
label_desc: Use image node_id 2 for calling the DeepSpeedMLPFunction obj's underlying member method code with example usage: obj.backward(ctx, grad_output) without return types