code: def l2_norm(location1, location2):
      """Computes the Euclidean distance between two carla.Location objects."""
      dx = location1.x - location2.x
      dy = location1.y - location2.y
      dz = location1.z - location2.z
      return math.sqrt(dx**2 + dy**2 + dz**2) + epsilon
  
imports: import os
  import cv2
  import math
  import random
  import numpy
  import carla
  import pygame
  import threading
  import datetime
  from typing import Union
  from tensorforce.agents import Agent
label_desc: Use image node_id 21 for calling a global function with example usage: l2_norm(location1, location2) and returns: unknown