code: def _init_weight(w, init_gain=1):
      w.copy_(truncated_normal_fill(w.shape, std=init_gain))
  
imports: from collections import OrderedDict
  import os
  import numpy
  import torch
  from torch import nn
  from gluoncv.torch.utils.coot_utils import truncated_normal_fill
label_desc: Use image node_id 2 for calling a global function with example usage: _init_weight(w, init_gain) without return types