code: def distance(center_1, center_2):
      return math.sqrt(
          math.pow(center_1[0] - center_2[0], 2)
          + math.pow(center_1[1] - center_2[1], 2)
      )
  
imports: import os
  import cv2
  import time
  import numpy
  import collections
  import math
label_desc: Use image node_id 8 for calling a global function with example usage: distance(center_1, center_2) and returns: math