code: def normalize(h):
      return (h - h.mean(0)) / h.std(0)
  
file_path: dgl/examples/pytorch/sgc/sgc_reddit.py
imports: import argparse
  import math
  import time
  import dgl.function
  import numpy
  import torch
  import torch.nn
  import torch.nn.functional
  from dgl import DGLGraph
  from dgl.data import load_data, register_data_args
  from dgl.nn.pytorch.conv import SGConv
label_desc: Use image node_id 1 for calling a global function with example usage: normalize(h) and returns: unknown