code: def create_hook_fn(module, idx):
      return lambda grad: rescale_grad_hook(module, idx, grad)
  
imports: import torch
  import torch.nn
  from fairseq.models import FairseqEncoder, FairseqIncrementalDecoder
  from pytorch_translate import utils
  from pytorch_translate.data import data
label_desc: Use image node_id 2 for calling a global function with example usage: create_hook_fn(module, idx) and returns: function