code: def norm(a):
      m = mag(a)
      return (a[0] / m, a[1] / m, a[2] / m)
  
file_path: sympy/sympy/plotting/pygletplot/plot_rotation.py
imports: import pyglet.gl
  from math import sqrt, acos
label_desc: Use image node_id 4 for calling a global function with example usage: norm(a) and returns: unknown,  unknown,  unknown