code: def normalize(x):
      epsilon = 1e-12
      norm = np.sqrt(np.sum(x**2, axis=0))
      norm = np.maximum(norm, epsilon)
      return x / norm
  
file_path: insightface/python-package/insightface/thirdparty/face3d/mesh/transform.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import numpy
  import math
  from math import cos, sin
label_desc: Use image node_id 5 for calling a global function with example usage: normalize(x) and returns: unknown