code: def l2norm(vec):
      vec /= np.linalg.norm(vec, axis=1).reshape(-1, 1)
      return vec
  
file_path: dgl/examples/pytorch/hilander/utils/misc.py
imports: import json
  import os
  import pickle
  import random
  import time
  import numpy
label_desc: Use image node_id 2 for calling a global function with example usage: l2norm(vec) and returns: vec