code: def norm(vec):
      return np.sqrt(vec.x * vec.x + vec.y * vec.y + vec.z * vec.z)
  
imports: import glob
  import os
  import sys
  import argparse
  import time
  import numpy
  import carla
label_desc: Use image node_id 4 for calling a global function with example usage: norm(vec) and returns: np