code: def drelu_dscale1(grad_o, output, scale1):
      relu_mask = output > 0
      dx_relu = relu_mask * grad_o
      g1 = dx_relu * scale1
      return g1, dx_relu
  
imports: import functools
  import torch
  import torch.distributed
  from torch import nn
  from apex import check_cudnn_version_and_warn
  import fast_bottleneck
  import nccl_p2p_cuda
label_desc: Use image node_id 4 for calling a global function with example usage: drelu_dscale1(grad_o, output, scale1) and returns: g1,  dx_relu